Added more summary information for debugging python versions
Added more summary information for debugging python versions

Summary: Closes https://github.com/caffe2/caffe2/pull/167

Reviewed By: Yangqing

Differential Revision: D4610416

Pulled By: bwasti

fbshipit-source-id: 0f56941bed2a75105787e518a71638916e4d503f

sf-wind/caffe2,pietern/caffe2,xzturn/caffe2,bwasti/caffe2,davinwang/caffe2,bwasti/caffe2,caffe2/caffe2,Yangqing/caffe2,pietern/caffe2,bwasti/caffe2,Yangqing/caffe2,xzturn/caffe2,Yangqing/caffe2,sf-wind/caffe2,pietern/caffe2,xzturn/caffe2,sf-wind/caffe2,bwasti/caffe2,pietern/caffe2,sf-wind/caffe2,Yangqing/caffe2,davinwang/caffe2,bwasti/caffe2,pietern/caffe2,davinwang/caffe2,xzturn/caffe2,sf-wind/caffe2,davinwang/caffe2,davinwang/caffe2,xzturn/caffe2,Yangqing/caffe2