update to use new C++ BRICS code

git-svn-id: svn://svn.code.sf.net/p/rdkit/code/trunk@2404 a5045d30-4826-4484-9c7f-6e55a06ddc77
allow Dicts to convert from string or char * to numeric types;
this is the fix for issue288

git-svn-id: svn://svn.code.sf.net/p/rdkit/code/trunk@2405 a5045d30-4826-4484-9c7f-6e55a06ddc77