Reverse dependencies for erector-rails4

Latest version of the following gems require erector-rails4

Gem	Version	Date	Downloads
dvl-core +39.3 Thousand Downloads	`0.1.0` January 06, 2015	January 06, 2015	39.3 Thousand
formbuilder-rb +24.2 Thousand Downloads	`0.2.4` May 06, 2014	May 06, 2014	24.2 Thousand
dvl-flashes +13.2 Thousand Downloads	`0.0.4` November 10, 2014	November 10, 2014	13.2 Thousand
potatochop-erector +3.87 Thousand Downloads	`0.0.1` September 03, 2014	September 03, 2014	3.87 Thousand