high order patch #2294
need to set right quadrature order for aux elemental variable evaluation #2294
a test for the high order aux variable #2294
Merge pull request #2615 from YaqiWang/high_order_2294

High order #2294
fixup test closes #2294
RichardsRelPermPowerGas added, and tests added.  This should close #2635
Merge pull request #2648 from WilkAndy/feature_2635

RichardsRelPermPowerGas added, and tests added.  This should close #2635