ENH: accept non-int definitions of cluster groups
ENH: use np.unique for indexing clusters
ENH: using human-readable group names instead of integer ids in MultiComparison
added file that got left behind
Put back an import that my IDE incorrectly flagged as unused
Added unit test for the group_order parameter of MultiComparison. It also tests the human-readable labels in TukeyHSDResults are in the right order
Expanded docstring of MultiComparison
Added b prefix to test strings
REF: First pass at pulling optimization out of LikelihoodModel.
TST: Don't pass DataFrame to numpy
TST: Dont set_index with PeriodIndex. Known bug.
TST: Not a failure if joblib is installed
TST: Use NumpyVersion
TST: Don't use generator. Closes #1145.
REF: Delegate don't inherit
Merge pull request #1121 from jseabold/optimizer-class

WIP: Refactor optimization code.
TST: knownfailureif -> skipif
Merge pull request #1549 from jseabold/test-fails

TST: Fix locally failing tests.
TST: gmm-poisson better starting value for scipy 0.13 closes #1420
TST: revert skipif for tests that don't fail anymore