Base models
Added Controller & model methods for viewing messages.
Convo created_at ago
Messages controller
Added form for new message & controller actions
Fixed model relationships
Show destroy button if message created_at >= 5.minutes.ago
Added current user comparison to destroy button
Add check_is_participating method for message model
New convo modal popup

Just need to add in add recipient participant before_action
Pushing changes to modal
Merge branch 'messages'

Conflicts:
	app/controllers/users_controller.rb
	app/models/user.rb
	db/schema.rb
conflict resolves