Move site-specific configuration out of environment.rb into a YAML file. This allows us to ship environment.rb with Tracks. Fixes #813.

lib/tracks/config.rb

@@ -1,20 +1,15 @@
 module Tracks
-  
   class Config
-    
     def self.salt
-      SALT
+       SITE_CONFIG['salt']
     end
 
     def self.auth_schemes
-      AUTHENTICATION_SCHEMES
+       SITE_CONFIG['authentication_schemes'] || []
     end
     
     def self.openid_enabled?
       auth_schemes.include?('open_id')
     end
-    
-    
   end
-  
 end