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

sorry. 
I need it because on the sign up page. I have  
  <p><%= link_to "User Index", users_path %></p> in the layout, so it will break if I do not have @users.