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clarified licensing

Utz-Uwe Haus Utz-Uwe Haus 2008-03-13

added LICENSE.GPL
added README
copied LICENSE -> LICENSE.Lisp-GPL-Preface
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LICENSE to LICENSE.Lisp-GPL-Preface
--- a/LICENSE
+++ b/LICENSE.Lisp-GPL-Preface
@@ -1,165 +1,64 @@
-		   GNU LESSER GENERAL PUBLIC LICENSE
-                       Version 3, 29 June 2007
+Copyright (C) 2007-2008 by Utz-Uwe Haus and Tamon Stephen.
 
- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
+This code is free software; you can redistribute it and/or modify it
+under the terms of the version 3 of the GNU General Public License
+(GPL) found in the file LICENSE.GPL published by the Free Software
+Foundation, as clarified by the the following preable inspired by
+Franz Inc.'s preamble to the LGPL found in
+<http://opensource.franz.com/preamble.html>:
 
+Preamble to the Gnu General Public License 	 
+------------------------------------------
 
-  This version of the GNU Lesser General Public License incorporates
-the terms and conditions of version 3 of the GNU General Public
-License, supplemented by the additional permissions listed below.
+The concept of the GNU Lesser General Public License version 3
+("GPL") has been adopted to govern the use and distribution of
+this application. However, the GPL uses terminology that
+is more appropriate for a program written in C than one written in
+Lisp. Nevertheless, the GPL can still be applied to a Lisp program if
+certain clarifications are made. This document details those
+clarifications. Accordingly, the license for the open-source Lisp
+applications consists of this document plus the GPL. Wherever there
+is a conflict between this document and the GPL, this document takes
+precedence over the GPL.
 
-  0. Additional Definitions. 
+A "Library" in Lisp is a collection of Lisp functions, data and
+foreign modules. The form of the Library can be Lisp source code (for
+processing by an interpreter) or object code (usually the result of
+compilation of source code or built with some other mechanisms).
+Foreign modules are object code in a form that can be linked into a
+Lisp executable. When we speak of functions we do so in the most
+general way to include, in addition, methods and unnamed functions.
+Lisp "data" is also a general term that includes the data structures
+resulting from defining Lisp classes. A Lisp application may include
+the same set of Lisp objects as does a Library, but this does not mean
+that the application is necessarily a "work based on the Library" it
+contains.
 
-  As used herein, "this License" refers to version 3 of the GNU Lesser
-General Public License, and the "GNU GPL" refers to version 3 of the GNU
-General Public License.
+The Library consists of everything in the distribution file set before
+any modifications are made to the files. If any of the functions or
+classes in the Library are redefined in other files, then those
+redefinitions ARE considered a work based on the Library. If
+additional methods are added to generic functions in the Library,
+those additional methods are NOT considered a work based on the
+Library. If Library classes are subclassed, these subclasses are NOT
+considered a work based on the Library. If the Library is modified to
+explicitly call other functions that are neither part of Lisp itself
+nor an available add-on module to Lisp, then the functions called by
+the modified Library ARE considered a work based on the Library. The
+goal is to ensure that the Library will compile and run without
+getting undefined function errors.
 
-  "The Library" refers to a covered work governed by this License,
-other than an Application or a Combined Work as defined below.
+It is permitted to link to proprietary code, in the sense that an
+Application may use both the Library and the proprietary code: The
+code that makes use of the Library must be released under this
+license, but the proprietary code need not, as long as it is
+independent of the presence of the Library. (See closing paragraph of
+GPL Sect. 5.)
 
-  An "Application" is any work that makes use of an interface provided
-by the Library, but which is not otherwise based on the Library.
-Defining a subclass of a class defined by the Library is deemed a mode
-of using an interface provided by the Library.
+In connection with each distribution of this executable, you must also
+deliver, in accordance with the terms and conditions of the GPL, the
+source code of Library (or your derivative thereof) that is
+incorporated into this executable.
 
-  A "Combined Work" is a work produced by combining or linking an
-Application with the Library.  The particular version of the Library
-with which the Combined Work was made is also called the "Linked
-Version".
+End of Document
 
-  The "Minimal Corresponding Source" for a Combined Work means the
-Corresponding Source for the Combined Work, excluding any source code
-for portions of the Combined Work that, considered in isolation, are
-based on the Application, and not on the Linked Version.
-
-  The "Corresponding Application Code" for a Combined Work means the
-object code and/or source code for the Application, including any data
-and utility programs needed for reproducing the Combined Work from the
-Application, but excluding the System Libraries of the Combined Work.
-
-  1. Exception to Section 3 of the GNU GPL.
-
-  You may convey a covered work under sections 3 and 4 of this License
-without being bound by section 3 of the GNU GPL.
-
-  2. Conveying Modified Versions.
-
-  If you modify a copy of the Library, and, in your modifications, a
-facility refers to a function or data to be supplied by an Application
-that uses the facility (other than as an argument passed when the
-facility is invoked), then you may convey a copy of the modified
-version:
-
-   a) under this License, provided that you make a good faith effort to
-   ensure that, in the event an Application does not supply the
-   function or data, the facility still operates, and performs
-   whatever part of its purpose remains meaningful, or
-
-   b) under the GNU GPL, with none of the additional permissions of
-   this License applicable to that copy.
-
-  3. Object Code Incorporating Material from Library Header Files.
-
-  The object code form of an Application may incorporate material from
-a header file that is part of the Library.  You may convey such object
-code under terms of your choice, provided that, if the incorporated
-material is not limited to numerical parameters, data structure
-layouts and accessors, or small macros, inline functions and templates
-(ten or fewer lines in length), you do both of the following:
-
-   a) Give prominent notice with each copy of the object code that the
-   Library is used in it and that the Library and its use are
-   covered by this License.
-
-   b) Accompany the object code with a copy of the GNU GPL and this license
-   document.
-
-  4. Combined Works.
-
-  You may convey a Combined Work under terms of your choice that,
-taken together, effectively do not restrict modification of the
-portions of the Library contained in the Combined Work and reverse
-engineering for debugging such modifications, if you also do each of
-the following:
-
-   a) Give prominent notice with each copy of the Combined Work that
-   the Library is used in it and that the Library and its use are
-   covered by this License.
-
-   b) Accompany the Combined Work with a copy of the GNU GPL and this license
-   document.
-
-   c) For a Combined Work that displays copyright notices during
-   execution, include the copyright notice for the Library among
-   these notices, as well as a reference directing the user to the
-   copies of the GNU GPL and this license document.
-
-   d) Do one of the following:
-
-       0) Convey the Minimal Corresponding Source under the terms of this
-       License, and the Corresponding Application Code in a form
-       suitable for, and under terms that permit, the user to
-       recombine or relink the Application with a modified version of
-       the Linked Version to produce a modified Combined Work, in the
-       manner specified by section 6 of the GNU GPL for conveying
-       Corresponding Source.
-
-       1) Use a suitable shared library mechanism for linking with the
-       Library.  A suitable mechanism is one that (a) uses at run time
-       a copy of the Library already present on the user's computer
-       system, and (b) will operate properly with a modified version
-       of the Library that is interface-compatible with the Linked
-       Version. 
-
-   e) Provide Installation Information, but only if you would otherwise
-   be required to provide such information under section 6 of the
-   GNU GPL, and only to the extent that such information is
-   necessary to install and execute a modified version of the
-   Combined Work produced by recombining or relinking the
-   Application with a modified version of the Linked Version. (If
-   you use option 4d0, the Installation Information must accompany
-   the Minimal Corresponding Source and Corresponding Application
-   Code. If you use option 4d1, you must provide the Installation
-   Information in the manner specified by section 6 of the GNU GPL
-   for conveying Corresponding Source.)
-
-  5. Combined Libraries.
-
-  You may place library facilities that are a work based on the
-Library side by side in a single library together with other library
-facilities that are not Applications and are not covered by this
-License, and convey such a combined library under terms of your
-choice, if you do both of the following:
-
-   a) Accompany the combined library with a copy of the same work based
-   on the Library, uncombined with any other library facilities,
-   conveyed under the terms of this License.
-
-   b) Give prominent notice with the combined library that part of it
-   is a work based on the Library, and explaining where to find the
-   accompanying uncombined form of the same work.
-
-  6. Revised Versions of the GNU Lesser General Public License.
-
-  The Free Software Foundation may publish revised and/or new versions
-of the GNU Lesser General Public License from time to time. Such new
-versions will be similar in spirit to the present version, but may
-differ in detail to address new problems or concerns.
-
-  Each version is given a distinguishing version number. If the
-Library as you received it specifies that a certain numbered version
-of the GNU Lesser General Public License "or any later version"
-applies to it, you have the option of following the terms and
-conditions either of that published version or of any later version
-published by the Free Software Foundation. If the Library as you
-received it does not specify a version number of the GNU Lesser
-General Public License, you may choose any version of the GNU Lesser
-General Public License ever published by the Free Software Foundation.
-
-  If the Library as you received it specifies that a proxy can decide
-whether future versions of the GNU Lesser General Public License shall
-apply, that proxy's public statement of acceptance of any version is
-permanent authorization for you to choose that version for the
-Library.