added tracker to docs
added tracker to docs

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