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
Fix some of our data loading to return an iter rather than a list so first() can work and add dtypes and ftypes to prdd API
Add get_dtype_counts get_ftype_counts get_axes get_shape to our dataframe