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

spec/factories/lodgings.rb

@@ -5,6 +5,5 @@ FactoryGirl.define do
     name 'Example Hotel'
     description 'Lorem Ipsum Dolor'
     website_link 'http://www.example.com'
-    venue
   end
 end