Bumped version to 0.8.7.
Bumped version to 0.8.7.

pjump/rake,codedogfish/rake,zzak/rake,jaustinhughey/rake,mat/rake,ipmobiletech/rake,ruby/rake,utilum/rake,ruby/rake,bentley/rake,88rabbit/rake,mat/rake,envato/rake,hsbt/rake,taiganakagawa/rake,esasse/rake,Vanzct/rake,envato/rake,tmornini/rake,askl56/rake,hsbt/rake