Merge branch 'fix-migration' into 'master'

Fix broken migration
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

For !2927 

See merge request !3011

db/migrate/20160222153918_create_appearances_ce.rb

-class CreateAppearancesCE < ActiveRecord::Migration
+class CreateAppearancesCe < ActiveRecord::Migration
   def change
     unless table_exists?(:appearances)
       create_table :appearances do |t|