release notes update

git-svn-id: svn://svn.code.sf.net/p/rdkit/code/trunk@2488 a5045d30-4826-4484-9c7f-6e55a06ddc77
getting ready for beta

git-svn-id: svn://svn.code.sf.net/p/rdkit/code/trunk@2489 a5045d30-4826-4484-9c7f-6e55a06ddc77
add chem transforms test

git-svn-id: svn://svn.code.sf.net/p/rdkit/code/trunk@2490 a5045d30-4826-4484-9c7f-6e55a06ddc77
stop stripping kwargs for substruct searching in IPythonConsole

git-svn-id: svn://svn.code.sf.net/p/rdkit/code/trunk@2491 a5045d30-4826-4484-9c7f-6e55a06ddc77