Added experiences to db and the edit_profile form.
Adding experience files
Added experience_link model and updated schema and user/experience
associations
adding experiences works now
Added experiencelinks. edit_profile now contains a separate
experiences form that successfully adds nested experiencelinks.
No polymorphism, no connection between links and users/studios (yet).
Removed user->experience nesting and added collab polymorphism.
Nested experience->experiencelinks works.
Added get_title and get_url helpers to help display an experiencelink.
But, experiencelink form still requires an id number.
Can successfully add an experiencelink for a dancer by username.
(No validations yet).
Merge branch 'rupa_edit_profile'

Conflicts:
	app/models/user.rb
	config/routes.rb
	db/schema.rb
Fixed navbar link to current profile