Add groupby support on dataframes to SparkLing pandas. Add a helper method to make a distributed dataframe from a local dataframe (this results in types being reguessed so it is less than ideal), add back in a run-tests script that can yell if SPARK_HOME isn't set (whereas directly using nose just resulted in no output). Add inital code coverage, although we might want to disable it since it only reports on things which run locally and most of our stuff runs remotetly. Remove some dead code from utils. Also update unittest library to unittest2.
Add some missing files (oops)
And add run-tests. oops. Serves me right for trying to make a clean tree :p
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