Cleaning up analyze.py
Simple nosetest of analyze.py now works.
Eliminated debug print statement from repex.
Disabled doctests in systembuilder.py until we sort out openeye import situation.
Removed setup.cfg and added nosetests flags to .travis.yml.
Temporary staged commit for renaming from yank -> Yank to solve version.py issue.
Completed renaming of yank/yank -> yank/Yank in an attempt to fix travis version.py import issue.
Merge branch 'jchodera-fix-analyze'