Add "name" to MaterialPropertyInterface
Store the name with each material property request for better error messages
closes #3247
Clean up Split Cahn-Hilliard kernels (#3341)
Merge pull request #3344 from dschwen/split_3341

Clean up Split Cahn-Hilliard kernels
Merge pull request #3337 from permcody/better_error_3247

Report object requesting material property when there's an error
Merge commit '6c5ac91c614ac6cbb9b73e79e3bb9f31511bdee1'
Merge commit '86c9df80b4a1fda504e13409b14e55e5476edec8'