build_db now correctly handles syncing FHC events
removed redundancies in importing events

previously, was adding variables is_control and ctrltime to each
events dataset; now since all datasets are stored independently, do
not need this
changed csv locations
corrected refs to self in build_db.py
another minor bug fix
data now imports for both bartc and gonogo
modified DataSets class to accept a parameter for event storage

If multiple events of same name can occur each trial, events must be
stored "flat" or "melted". Defaults to False, which attempts to make
one column per event.
added scratch file to plot psths
updates to gitignore