A large number of doccomment style fixes
spelling fix
Remove extra space from docstring
Fix docstrings in the groupbytests
switch the functions in groupby to snake case
Add a node about the test_agg_api in the pandasgroupbytests and make nth work with older versions of pandas
Remove a todo about median because stats counter doesn't support it, fix the wording in __iter__
reindent everything
Get rid of space before return
Revert "reindent everything"

This reverts commit 238dea289c7e52f07ca3b5025d4c7e6239057d0c.
Test var between dgroup and local
Add some more spaces and remove a TODO
Call indent region on the block
Code review feedback
Fix pep8 issues
Merge pull request #29 from holdenk/add-simple-groupby-r2

Add simple groupby
Merge branch 'master' into add-spark-sql-support