Improve clean up in cleanbuild script.
Improve clean up in cleanbuild script.

lscheinkman/nupic,neuroidss/nupic,brev/nupic,akhilaananthram/nupic,loretoparisi/nupic,ywcui1990/nupic,jcasner/nupic,alfonsokim/nupic,lscheinkman/nupic,arhik/nupic,fergalbyrne/nupic,sambitgaan/nupic,wanghaven/nupic,vitaly-krugl/nupic,pap/nupic,wanghaven/nupic,jcasner/nupic,marionleborgne/nupic,pulinagrawal/nupic,go-bears/nupic,elkingtonmcb/nupic,cngo-github/nupic,rcrowder/nupic,darshanthaker/nupic,runt18/nupic,marionleborgne/nupic,badlogicmanpreet/nupic,SaganBolliger/nupic,sambitgaan/nupic,breznak/nupic,rayNymous/nupic,neuroidss/nupic,runt18/nupic,eranchetz/nupic,blueburningcoder/nupic,fergalbyrne/nupic,mcanthony/nupic,pap/nupic,allanino/nupic,metaml/nupic,vamsirajendra/nupic,chanceraine/nupic,virneo/nupic,alfonsokim/nupic,ben-hopps/nupic,elkingtonmcb/nupic,elkingtonmcb/nupic,virneo/nupic,mcanthony/nupic,SaganBolliger/nupic,glorizen/nupic,glorizen/nupic,badlogicmanpreet/nupic,subutai/nupic,lscheinkman/nupic,blueburningcoder/nupic,scottpurdy/nupic,numenta/nupic,metaml/nupic,BoltzmannBrain/nupic,pulinagrawal/nupic,markneville/nupic,numenta-ci/nupic,marionleborgne/nupic,chen0031/nupic,rhyolight/nupic,allanino/nupic,passiweinberger/nupic,sambitgaan/nupic,rayNymous/nupic,loretoparisi/nupic,numenta-ci/nupic,rayNymous/nupic,vitaly-krugl/nupic,BeiLuoShiMen/nupic,ywcui1990/nupic,metaml/nupic,rcrowder/nupic,akhilaananthram/nupic,SaganBolliger/nupic,pap/nupic,eranchetz/nupic,eranchetz/nupic,jcasner/nupic,arhik/nupic,vitaly-krugl/nupic,neuroidss/nupic,EricSB/nupic,numenta-ci/nupic,rhyolight/nupic,darshanthaker/nupic,virneo/nupic,glorizen/nupic,GeraldLoeffler/nupic,alfonsokim/nupic,mcanthony/nupic,subutai/nupic,EricSB/nupic,rhyolight/nupic,numenta/nupic,cogmission/nupic,cngo-github/nupic,badlogicmanpreet/nupic,breznak/nupic,EricSB/nupic,chanceraine/nupic,scottpurdy/nupic,loretoparisi/nupic,markneville/nupic,BoltzmannBrain/nupic,passiweinberger/nupic,breznak/nupic,cogmission/nupic,BeiLuoShiMen/nupic,vamsirajendra/nupic,ben-hopps/nupic,BeiLuoShiMen/nupic,brev/nupic,blueburningcoder/nupic,runt18/nupic,chanceraine/nupic,pulinagrawal/nupic,ywcui1990/nupic,cngo-github/nupic,arhik/nupic,GeraldLoeffler/nupic,wanghaven/nupic,go-bears/nupic,chen0031/nupic,brev/nupic,numenta/nupic,chen0031/nupic,go-bears/nupic,akhilaananthram/nupic,rcrowder/nupic,darshanthaker/nupic,GeraldLoeffler/nupic,vamsirajendra/nupic,fergalbyrne/nupic,cogmission/nupic,scottpurdy/nupic,markneville/nupic,passiweinberger/nupic,ben-hopps/nupic,subutai/nupic,allanino/nupic,BoltzmannBrain/nupic