#12 Source file headers clean up

[Egon Willighagen]

The header of our Java source files should have a first line that looks like:

/* Copyright (C) 2000-2007 Christoph Steinbeck steinbeck@users.sf.net
*
* Contact: cdk-devel@lists.sourceforge.net

The copyright lines should list all authors (which you can look up with "git log") and include the email address of the author.

Currently, many source files have lines like this:

/* $RCSfile$
* $Author$
* $Date$
* $Revision$

Or the same SVN/CVS fields collapsed on a single line. But after we move to git we no longer use these lines, and can be removed.