some cleanup of request for comments. Work in progress.

Noticed a flaw when fetching the last submission, which is caused by timezone differences. First step to solve this.
Existing Request for Comments still need to be updated with their current submissionId, the SQL to do that is not yet finished.

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160624130951) do
+ActiveRecord::Schema.define(version: 20160630154310) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -191,6 +191,7 @@ ActiveRecord::Schema.define(version: 20160624130951) do
     t.string   "user_type"
     t.text     "question"
     t.boolean  "solved"
+    t.integer  "submission_id"
   end
 
   create_table "submissions", force: true do |t|