Adding numpy to README requirements.
Adding numpy to README requirements.

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