BRICS-related bug fixes

git-svn-id: svn://svn.code.sf.net/p/rdkit/code/trunk@2406 a5045d30-4826-4484-9c7f-6e55a06ddc77
add missing headers for "make install"
fixes github issue 2

git-svn-id: svn://svn.code.sf.net/p/rdkit/code/trunk@2407 a5045d30-4826-4484-9c7f-6e55a06ddc77