Fixed eval and astype#11

Merged

devin-petersohn merged 6 commits intodevin-petersohn:rewrite_backendfrom

williamma12:dev

Sep 15, 2018

Commits on Sep 10, 2018

Updated to_datetime docstring
williamma12
committed

Commits on Sep 12, 2018

Commits on Sep 13, 2018

Commits on Sep 14, 2018

removed empty space and uncommented test_loc and test_iloc
williamma12
committed