Add version check for incompatible Python 3.x/virtualenv 1.11 combination
Add version check for incompatible Python 3.x/virtualenv 1.11 combination

qwhelan/asv,ericdill/asv,pv/asv,airspeed-velocity/asv,pv/asv,mdboom/asv,qwhelan/asv,edisongustavo/asv,qwhelan/asv,airspeed-velocity/asv,cpcloud/asv,spacetelescope/asv,airspeed-velocity/asv,mdboom/asv,waylonflinn/asv,cpcloud/asv,pv/asv,spacetelescope/asv,cpcloud/asv,airspeed-velocity/asv,spacetelescope/asv,edisongustavo/asv,edisongustavo/asv,giltis/asv,ericdill/asv,pv/asv,waylonflinn/asv,ericdill/asv,mdboom/asv,mdboom/asv,spacetelescope/asv,ericdill/asv,waylonflinn/asv,giltis/asv,giltis/asv,qwhelan/asv