add ConvertDativeBonds to pybel
Extended superatoms.txt from Chris Swain
Fix bug in --filter parsing (Oleksii Balinskyi)
Merge pull request #2 from bgruening/pybel

Add ConvertDativeBonds to pybel
Merge pull request #1 from mwojcikowski/master

Fix missing LPMD file in src/format
Fix compile error with lpmdformat.

Loop over atoms in ::WriteMolecule() was incorrect
and OBMol::GetAtom() was called with an invalid variable.
Fix typo in OOP bending evaluation.

Bug found by Athanasios Anthopoulos <AnthopoulosA@cardiff.ac.uk>.