[CIG-SHORT] DruckerPrager

[Birendra jha]

Hi 

DruckerPrager3D::_calcStressElastoplastic has the following line

      const PylithScalar d =
        sqrt(ae * ae * devStressInitialProd + 2.0 * ae *

This eqn in the manual, Eq.(5.110), has a factor of 2 in the 1st term.

Thanks
Birendra