update docs pdf

git-svn-id: svn://svn.code.sf.net/p/rdkit/code/trunk@2506 a5045d30-4826-4484-9c7f-6e55a06ddc77
version bump for cartridge

git-svn-id: svn://svn.code.sf.net/p/rdkit/code/trunk@2507 a5045d30-4826-4484-9c7f-6e55a06ddc77
comment out the new substruct atom-match caching code; it does not seem to actually make things faster

git-svn-id: svn://svn.code.sf.net/p/rdkit/code/trunk@2508 a5045d30-4826-4484-9c7f-6e55a06ddc77