Added Devise and its controllers and views
Added devise and functionality for token based one_time access
Added letter_opener
Added usermanagement to header
Merge branch 'feature/user-model' into develop
Merge branch 'master' into develop

Conflicts:
	app/models/user.rb
	db/schema.rb
	test/fixtures/users.yml
Reverted User stuff
Firefox beta request bug fix
Fix Fix details button
Link to details text
Link title to root
map on own rout and fullscreen app