gcc fix: std::make_pair
gcc fix: std::make_pair

fix error reported as :
/home/marek/devel/nupic/nta/math/SparseTensor.hpp:2928:53: error: 'make_pair' was not declared in this scope, and no declarations were found by argument-dependent lookup at the point of instantiation [-fpermissive]
         return make_pair(getNewZeroIndex(), Float(0));

by adding std:: namespace

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