Put map to users

Add CSS to layout
Add location hash to dashboard
Add map to users show, users index, dashboard show 
Add accepts_nested_attributes_for user model
Add delegate city, state, latitude and longitude, to user model 
Add form.fields_for to user form partial
Clean up some code in the views, put some link tag to layout
Change hash name in location controller and user controller
Make Gmap model

Is `Gmap` an ActiveRecord model? Should it be persisted to the DB or is it just a helper class?