Add routes, controllers, views and mailers for session and registration.
Add jquery to move between forms. Add letter opener in development environment.
Add gems for developement environment. Add letter_opener.
Add Noty flash messages.
Add methods to User and Registrant models.
Add full signup/login/reset password process, profile page and update profile page.
Merge branch 'master' into add-login

Conflicts:
	Gemfile
	Gemfile.lock
Merge branch 'add-login'