Create sightings route
Create sightings controller
Add sightings handler
Create sighting class & spec files
Update alien and sighting specs, update association between both
Add sightings view
Update sightings index view
Add alien name to sighting
Create new sighting route
Add new sighting handler
Update new sighting view
Add aliens list to new sighting view
Update alien show view, WIP
Add region_id to sightings migration
Update Sighting class, belongs to region
Add 2 column layout
Change aliens index