Started adding docstrings and cleaning up.
More docstrings and cleanup for system_checker
Minor fixes.
PEP8
pyflakes, pep8, and docstrings for gafftools.py
Fixed some pyflakes bugs in amber_parser
minor docstring update in amber_parser.py
Major overhaul of test_drugs, now seems to be working with nose.  Major cleanup still required.
Chemicals is now installed as package data.
Started work on testing utils.
Add context manager for handling temp files, more unit tests.
Added (rather coarse) energy test to test_molecule.
Added some python2-3 compatibility stuff for subprocess.
Added files for travis, they don't work though.
Added files for travis, they don't work though.
Filled out docstrings in amber_parser.py
Filled out docstrings in utils.py
pyflakes and pep8 fixes.
Merge pull request #13 from choderalab/cleanup

[WIP] Started adding docstrings and cleaning up.