Try adding first using a regroup on the grouped rdd
Add first/last to groupby and start adding some groupby tests from pandas
Try and keep the types when we load from dataframe
Use itertuples
Use to_records
Type didn't handle py4j well Revert "Use to_records"

This reverts commit 16e1e5f1b8cb23bf248a9ac5a7d9794b62e63067.
Clean up the data load tests a bit
Add aggregate and test for aggregate to groupby
try fixing apply