- Added axisymmetric plane conditions. Can be used by setting
 2D_plane_condition = axisymmetric in damageinfo.dat file.
 Note that it requires to use setEvalStrain after using setting energy
 model in DamageGrowthbase.cc constructor, since setEvalStrain needs
 to know if axisymmetry is used.

 - Added evaluators for energy and energy damage derivative. Not used
 directly in computations, but may be useful for debugging.