relax gem requirements, and let ruby 1.9.3 rspec work
relax gem requirements, and let ruby 1.9.3 rspec work

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