Reverse dependencies for pow

Latest version of the following gems require pow

Gem	Version	Date	Downloads
switch_file +14.3 Thousand Downloads	`0.1.2` May 20, 2012	May 20, 2012	14.3 Thousand
ngpod_scraper +7.75 Thousand Downloads	`0.1.2` February 03, 2014	February 03, 2014	7.75 Thousand
sinatra-auth +5.39 Thousand Downloads	`0.0.9` December 14, 2009	December 14, 2009	5.39 Thousand
local_unfuddle_notebook +4.84 Thousand Downloads	`1.0.0` October 31, 2011	October 31, 2011	4.84 Thousand