Reverse dependencies for summon

Latest version of the following gems require summon

Gem	Version	Date	Downloads
bento_search +99.3 Thousand Downloads	`1.7.0` February 13, 2017	February 13, 2017	99.3 Thousand
summon-refworks +4.73 Thousand Downloads	`0.0.1` May 24, 2012	May 24, 2012	4.73 Thousand
quick_search-summon_searcher +3.52 Thousand Downloads	`0.0.1` April 14, 2017	April 14, 2017	3.52 Thousand