Finished fixing up readgrid.py for now. This function reads in all necessary time-independent grid information and puts it into a dictionary to be passed around. This has not been tested yet.
some small tweaks to readgrid.py and flushing out of setupROMSfiles.py
fixed up readfields.py, tweaked readgrid.py, updated run.py according to all these new python function files. Have not tested anything yet
code currently runs but output is not correct. When run with fake u,v fields, the drifter moves at different rates despite a uniform velocity field. Also, when run with the same case as the old HAB drifter code, they move in opposite directions.