Reverse dependencies for cohort_scope

Latest version of the following gems require cohort_scope

Gem	Version	Date	Downloads
loose_tight_dictionary +94.2 Thousand Downloads	`1.0.5` January 13, 2012	January 13, 2012	94.2 Thousand
earth-ruby19 +6.48 Thousand Downloads	`0.2.3` September 28, 2010	September 28, 2010	6.48 Thousand
emitter-ruby19 +5.71 Thousand Downloads	`0.1.4` September 28, 2010	September 28, 2010	5.71 Thousand