added example host-guest system--compound 19 from the paper in the README.md
fixed naming of residues
Merge pull request #137 from pgrinaway/compound19-example

Example host-guest system
Initial checkin of simplified travis
Dont test py33 on travis
Updated build.sh and travis.yml
Testing if we need pyyaml
Updates
Switched tests to use yank examples rather than openmmtools.
Slightly improved docstrings / comments
Ignore output on simulation.run()
Actually add ellipsis
Merge pull request #138 from kyleabeauchamp/travis2

[WIP] Initial checkin of simplified travis