Make sure we handle having a "problems" directory under the application - closes #3184
Adding ScalarCoupleable interface to ElementUserObjct (closes #3265)

It was not able to use scalar variables in anythong derived from
ElementUserObject, because it was missing ScalarCoupleable interface.
Fix incorrect suffix trimming logic
closes #3159
Merge pull request #3263 from permcody/peacock

Make sure we handle having a "problems" directory under the application
Merge pull request #3266 from andrsd/scalar-coupleable-for-elemental-user-objects

Adding ScalarCoupleable interface to ElementUserObjct (closes #3265)
Adding DifferencePostprocessor (closes #3268)
No executable required if not using RunApp derived Tester - closes #3239
Merge pull request #3270 from permcody/testharness_no_exec

No executable required if not using RunApp derived Tester
Merge pull request #3264 from permcody/TestHarness_fix

Fix incorrect suffix trimming logic
Avoid making @aeslaughter angry
closes #2928
Merge pull request #3269 from andrsd/diff-pps

Adding DifferencePostprocessor (closes #3268)
Merge pull request #3271 from permcody/auxkernel_better_error

Avoid making @aeslaughter angry
PR: under development.   Please don't merge yet.

Fully upwind Richards flux.  #3252 .

RichardsFullyUpwindFlux kernel has been added.
RichardsMaterial has been modified to provide necessary MaterialProperties
Lots of tests have been created.

Still to do:
 - some more tests of this kernel
 - bcs/RichardsFullyUpwindPiecewiseLinearSink (what a long name) must be created
 - dirackernels/RichardFullyUpwindBorehole must be created
 - tests of these two
 - doco in theory.tex, tests.tex and user.tex