Reverse dependencies for ninja

Latest version of the following gems require ninja

Gem	Version	Date	Downloads
integrity-bob +9.31 Thousand Downloads	`0.3.1` August 11, 2014	August 11, 2014	9.31 Thousand
transporter +5.3 Thousand Downloads	`0.1` August 18, 2009	August 18, 2009	5.3 Thousand
jeroenvandijk-bob +3.91 Thousand Downloads	`0.3.1` August 11, 2014	August 11, 2014	3.91 Thousand