Fix molecule dataframe rendering in pandas 0.13.x

Fixes #231
Merge pull request #236 from nhfechner/patch-1

Fix molecule dataframe rendering in pandas 0.13.x
update docs to reflect migration of the homebrew-rdkit recipe
support white and black lists for getMolFragsWithQuery
Merge branch 'master' into ml_pybindings_refactor

merges an updated upstream