Create a Sessions controller & add routes
Create controller methods
Sign in skeleton
Downcase emails. Also flash bad message

Note that flash.now is required
Cheat sign in

Also local user
Prepare to use SessionsHelper in all controllers
Add remember token tests

failing
Add remember tokens!
Add sign-in helpers
Conditional nav bar, signing in
Sign in user after creation
Add sign out capability
Merge pull request #7 from tylrtrmbl/sign-in-out

Implement User sign in and sign out