wip.  refactoring rx_nav interactions and models
ignore idea folder
Update meds to correct lookup able names from rasagaline to selegiline.
move shared utility to utils for rx_nav
Add specs for nui lookup.
Add specs for nui lookup
Update the rx_nav models to rescue on bad data to return nil.
refactor medication to populate needed data.

delegate severity to new library
remove old models
Merge pull request #2 from bigkat73/add_lookup_table

Add lookup table