Arbitrary command now works without a fabfile
Arbitrary command now works without a fabfile

Fixes #230

fernandezcuesta/fabric,felix-d/fabric,cmattoon/fabric,askulkarni2/fabric,pgroudas/fabric,cgvarela/fabric,StackStorm/fabric,itoed/fabric,opavader/fabric,qinrong/fabric,amaniak/fabric,bitmonk/fabric,bitprophet/fabric,hrubi/fabric,SamuelMarks/fabric,xLegoz/fabric,mathiasertl/fabric,likesxuqiang/fabric,kxxoling/fabric,ericholscher/fabric,tekapo/fabric,akaariai/fabric,kmonsoor/fabric,TarasRudnyk/fabric,tolbkni/fabric,raimon49/fabric,bspink/fabric,pashinin/fabric,ploxiln/fabric,haridsv/fabric,MjAbuz/fabric,jaraco/fabric,sdelements/fabric,getsentry/fabric,elijah513/fabric,rane-hs/fabric-py3,rodrigc/fabric,rbramwell/fabric