Modified changelog for st2ctl feature additions
Modified changelog for st2ctl feature additions

Plexxi/st2,nzlosh/st2,StackStorm/st2,nzlosh/st2,Plexxi/st2,Plexxi/st2,StackStorm/st2,StackStorm/st2,nzlosh/st2,Plexxi/st2,nzlosh/st2,StackStorm/st2