Regenerate gemspec for version 0.1.6
Regenerate gemspec for version 0.1.6

getaroom/mongoid-history,aq1018/mongoid-history,mongoid/mongoid-history,dblock/mongoid-history,Yakrware/mongoid-history,mateuspontes/mongoid-history,stephenhmarsh/mongoid-history,sivagollapalli/mongoid-history