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