Removed superfluous 'tracks' directory at the root of the repository.

Testing commits to github.

db/migrate/021_add_time_zone_preference.rb

@@ -0,0 +1,11 @@
+class AddTimeZonePreference < ActiveRecord::Migration
+
+  def self.up
+      add_column :preferences, :time_zone, :string, :limit => 255, :default => 'London', :null => false
+    end
+
+    def self.down
+      remove_column :preferences, :time_zone
+    end
+    
+end