Reverse dependencies for riot_notifier

Latest version of the following gems require riot_notifier

Gem	Version	Date	Downloads
valuedate +20.2 Thousand Downloads	`0.0.6` January 30, 2010	January 30, 2010	20.2 Thousand
structr +16.9 Thousand Downloads	`0.1.0` August 24, 2010	August 24, 2010	16.9 Thousand
meta_code_commenter +5.51 Thousand Downloads	`0.0.0` December 21, 2009	December 21, 2009	5.51 Thousand