destroy method for sightings works
all RESTful action working for sightings
add regions table with name column
modify sightings table by adding a region id
validates presence of name in region
regions have many sightings
sighting belongs to region
species has many regions through sightings
region has many species through sightings
routes added for regions new and create
region index created and working
creates regions
edit working
graphical improvements to ui
regions are added to animals
add region to sighting
displays region with animal sighting and displays species with region
fixed bug that let species have no region