Always write threaded restart files
closes #3250
Fixing PETSc option check
closes #3169
Merge pull request #3251 from permcody/fixup_restart_threads

Always write threaded restart files
Merge pull request #3253 from idaholab/petsc_option_check

Fixing PETSc option check
MaterialProperty.h no longer gives an unused param warning.  Fixed #3256
Merge pull request #3257 from WilkAndy/unused_param_3256

MaterialProperty.h no longer gives an unused param warning.  Fixed #3256