Add plog function (#4047)
Introduce substitution functors (#4047)
Add flexible rule based substitution system (#4047)
Merge pull request #4057 from dschwen/expb_4047

Add plog() and a nifty new substitution system
Modified FiniteStrainCrystalPlasticity #3949
Merge pull request #4103 from cpritam/feature_3949

Modified FiniteStrainCrystalPlasticity #3949
Implemented 'output_on' for output system (refs #3847)