further fingerprint improvements;
remove unused arguments for the layered fingerprint

git-svn-id: svn://svn.code.sf.net/p/rdkit/code/trunk@2458 a5045d30-4826-4484-9c7f-6e55a06ddc77
remove unused arguments for LayeredFingerprintMol

git-svn-id: svn://svn.code.sf.net/p/rdkit/code/trunk@2459 a5045d30-4826-4484-9c7f-6e55a06ddc77