Directory reorganization. We now have bknr/, modules/ and projects/ on

the top level in order to isolate base BKNR from extensions and the 
project code.  This is done in preperation of asdf-install'ability at   
least the base components.


git-svn-id: svn://bknr.net/svn/trunk/thirdparty/cl-gd@1797 4281704c-cde7-0310-8518-8e2dc76b1ff0