Another round of splash design

* Add map to splash
* Reverse venue<->conference relation
* Split venue address into fields
* Don't go through venue for lodgings anymore

db/migrate/20141117214230_move_banner_description_to_conference.rb

@@ -20,6 +20,6 @@ class MoveBannerDescriptionToConference < ActiveRecord::Migration
       end
     end
 
-    remove_column :splashpages, :banner_description, :text 
+    remove_column :splashpages, :banner_description, :text
   end
 end