Appveyor update
Appveyor update

Piping 7zip output to findstr to reduce log output.
Trying new VM accrding to -
http://www.appveyor.com/blog/2015/06/23/new-oss-build-environment-and-xamarin-support

sambitgaan/nupic.core,rhyolight/nupic.core,akhilaananthram/nupic.core,pettitda/nupic.core,EricSB/nupic.core,breznak/nupic.core,brev/nupic.core,rcrowder/nupic.core,pettitda/nupic.core,numenta/htmresearch-core,rcrowder/nupic.core,breznak/nupic.core,metaml/nupic.core,subutai/nupic.core,rhyolight/nupic.core,pettitda/nupic.core,jaredweiss/nupic.core,subutai/nupic.core,utensil/nupic.core,Bemujo/https-github.com-numenta-nupic,metaml/nupic.core,rcrowder/nupic.core,akhilaananthram/nupic.core,lscheinkman/nupic.core,ywcui1990/nupic.core,numenta/htmresearch-core,utensil/nupic.core,Bemujo/https-github.com-numenta-nupic,akhilaananthram/nupic.core,sambitgaan/nupic.core,Bemujo/https-github.com-numenta-nupic,scottpurdy/nupic.core,Bemujo/https-github.com-numenta-nupic,jaredweiss/nupic.core,breznak/nupic.core,rhyolight/nupic.core,subutai/nupic.core,rcrowder/nupic.core,lscheinkman/nupic.core,numenta/nupic.core,utensil/nupic.core,neuroidss/nupic.core,scottpurdy/nupic.core,brev/nupic.core,scottpurdy/nupic.core,numenta/nupic.core,metaml/nupic.core,sambitgaan/nupic.core,ywcui1990/nupic.core,subutai/nupic.core,jaredweiss/nupic.core,metaml/nupic.core,jaredweiss/nupic.core,ywcui1990/nupic.core,numenta/htmresearch-core,breznak/nupic.core,akhilaananthram/nupic.core,EricSB/nupic.core,numenta/nupic.core,sambitgaan/nupic.core,rhyolight/nupic.core,ywcui1990/nupic.core,neuroidss/nupic.core,scottpurdy/nupic.core,numenta/nupic.core,neuroidss/nupic.core,neuroidss/nupic.core,brev/nupic.core,numenta/htmresearch-core,lscheinkman/nupic.core,brev/nupic.core,pettitda/nupic.core,EricSB/nupic.core,lscheinkman/nupic.core,utensil/nupic.core,EricSB/nupic.core