BUG: iloc back to values for assignment. Closes #6602.
ENH: Make sure to return int for indices
Merge pull request #6603 from jseabold/fix-testing

ENH: Make sure makeMissing* works as expected.
Merge pull request #6601 from jreback/pop

BUG: Bug in popping from a Series (GH6600)
BUG/API: allow TimeGrouper with other columns in a groupby (GH3794)