clean up code
changes in README.md
moved FileNotFoundError into new compat module to make it available for import
Merge pull request #123 from xrotwang/refactorDataAccess

moved FileNotFoundError into new compat module
Merge remote-tracking branch 'upstream/master'
adjust filenotfound error
Merge pull request #124 from LinguList/master

Clean up code in model.py, derive.py, and setup.py
updated configuration
fixed problem in filenotfounderror resulting from relative import*
Merge remote-tracking branch 'upstream/master'
unify file access in data.derive module
Merge pull request #126 from LinguList/master

small fix to problem with filenotfounderror
Merge branch 'master' into unifyFileAccess
Merge pull request #127 from xrotwang/unifyFileAccess

Unify file access
next try
add requirements file back in (see https://github.com/rtfd/readthedocs.org/issues/236)
more fiddling
more fiddling
more fiddling
more fiddling