Added information on using directories to the usage text.
Added information on using directories to the usage text.

gtanner/jshint,cnbin/jshint,elkingtonmcb/jshint,AndriiGro/jshint,mcanthony/jshint,Jeremy017/jshint,silverwind/jshint,scottsmeester/jshint,darongE/jshint,Jeremy017/jshint,beni55/jshint,louwers/jshint,ghtest712/bearded-octo-dangerzone,niedzielski/jshint,zynick/jshint,mohsen1/jshint,crivas/jshint,stevemao/jshint,marian-r/jshint,behind2/jshint,alivesay/jshint,beni55/jshint,jshint/jshint,laurensortiz/jshint,fashionsun/jshint,ecomfe/edp-jshint,jonnyreeves/jshint,jshint/jshint,supriyantomaftuh/jshint,lovemeblender/jshint,crivas/jshint,shreyasgaonkar/jshint,wisavalite/jshint,nicolo-ribaudo/jshint,max789/jshint,fashionsun/jshint,yyx990803/jshint,pansay/jshint,doggy8088/jshint,BridgeAR/jshint,ljharb/jshint,paul-wade/jshint,jagdeesh109/jshint,ljharb/jshint,jugglinmike/jshint,mcanthony/jshint,louwers/jshint,n8io/jshint,supriyantomaftuh/jshint,doggy8088/jshint,luisbrito/jshint,laurensortiz/jshint,gtanner/jshint,goatslacker/jshint,gloryknight/jshint,wisavalite/jshint,paladox/jshint,thomas658/jshint,thomas658/jshint,paul-wade/jshint,mohsen1/jshint,kidaa/jshint,mrjoelkemp/jshint,jagdeesh109/jshint,davidjb/jshint,BridgeAR/jshint,n8io/jshint,davidjb/jshint,SqrTT/dwhint,wzup/jshint,Khan/jshint,aisk/jshint,paragag/AntiRedis,cnbin/jshint,freeyiyi1993/jshint,rwaldron/jshint,nicolo-ribaudo/jshint,AndriiGro/jshint,Joy603/jshint,mrjoelkemp/jshint,yadimon/jshint,max789/jshint,gratex/jshint,llucbrell/jshint,aisk/jshint,nitinlal/jshint,pansay/jshint,kangax/jshint,Endika/jshint,shreyasgaonkar/jshint,Endika/jshint,jugglinmike/jshint,kidaa/jshint,scottsmeester/jshint,llucbrell/jshint,gratex/jshint,wzup/jshint,behind2/jshint,lukeapage/jshint,yadimon/jshint,niedzielski/jshint,luisbrito/jshint,marian-r/jshint,stevemao/jshint,raix/jshint,ThiagoGarciaAlves/jshint,gameclosure/jsiohint,nitinlal/jshint,elkingtonmcb/jshint,freeyiyi1993/jshint,lukeapage/jshint,Joy603/jshint,meh-uk/jshint,alivesay/jshint,fairfieldt/jshint