Add mostly functional #create action in sessions controller
Add mostly functional #create action in sessions controller

The redirects for successful and unsuccessful login scenarios are hard-coded for now. I am going to refactor them to the rails helpers after I write the #destroy action.

nyc-rock-doves-2015/deviltea-overflow,nyc-rock-doves-2015/deviltea-overflow,nyc-rock-doves-2015/deviltea-overflow