Reverse dependencies for railroad

Latest version of the following gems require railroad

Gem	Version	Date	Downloads
p8-metric_fu +84.3 Thousand Downloads	`0.9.0.7` August 10, 2014	August 10, 2014	84.3 Thousand
indirect-metric_fu +9.38 Thousand Downloads	`0.9.0` August 11, 2014	August 11, 2014	9.38 Thousand
leh-metric_fu +3.79 Thousand Downloads	`0.9.2` August 11, 2014	August 11, 2014	3.79 Thousand