Add check for -std=c++11. We'll need it for Antioch.
0.9.2 of libMesh changed the API for getting the
quadrature rule from FEMContext. Now require 0.9.2 and
updated accordingly. Still need to update the other
FEMContext API's that became mandatory after the 0.9.2
release (but are available in 0.9.2).