Reverse dependencies for hikki

Latest version of the following gems require hikki

Gem	Version	Date	Downloads
hikki-mongo +9.94 Thousand Downloads	`0.0.3` January 28, 2014	January 28, 2014	9.94 Thousand
hikki-redis +9.89 Thousand Downloads	`0.0.3` January 28, 2014	January 28, 2014	9.89 Thousand
hikki-memcache +9.85 Thousand Downloads	`0.0.3` January 28, 2014	January 28, 2014	9.85 Thousand