clib2 Code

- Fixed an important error in the documentation...

- Added the clib2 shared library initialization/cleanup code.

- Modified to build with the thread-safe library on OS4.

- Updated to use the proper OS4 build environment.

This commit was manufactured by cvs2svn to create tag 'LIB_V1_2'.

- Updated for dual PowerPC/68k build.

This commit was manufactured by cvs2svn to create tag 'LIB_V1_1'.

- Added shared library skeleton code (68k-only for now).

- Moved all the constructor code out of "stdlib_init_exit.c" and into the
files which initialize global data, such as the new "stdlib_program_name.c"
and "stdlib_malloc.c".

- Until I can find a way to invoke it from within the library, the
__machine_test() function is no longer invoked.

- Tagged global data with NOCOMMON attributes.

- Added the __lib_init() and __lib_exit() functions, which are part of the
thread-safe library and which can be used to hook up clib2 with standard
Amiga shared library/device code. Some documentation on how to use them
can be found in the <dos.h> header file.

Removed unneeded baserel stuff