Start on allowing crimes to be grepped
lay the foundation for the grep
we don't need to grep on crime_type lookup. grep only applies to TYPE crimes
flesh out the beginning of the grep. beginning may be good enough.
added a list of the crime types, which got the grep working. Still a kludgy hack on the grep var type
cleanup
hunting down a false-positive when no location is passed to get_specific_crimes
fix the false-positive. was querying the wrong field, duh.
cleanup
clarify the options passed in the examples
added option for querying different CSVs
fix that grep option
small fix
some more example command improvements