Big commit:

- Support for a popup that shows similar topics
- Cleaned up a lot of Javascript
- Cleaned up use of Promises

db/migrate/20130315180637_enable_trigram_support.rb

@@ -0,0 +1,9 @@
+class EnableTrigramSupport < ActiveRecord::Migration
+  def up
+    execute "CREATE EXTENSION IF NOT EXISTS pg_trgm"
+  end
+
+  def down
+    execute "DROP EXTENSION pg_trgm"
+  end
+end