Bug fix in rotations of RankTwoTensor.  Tested using CPPUNIT in unit/src/RankTwoTensor.C

Fixes #3573
This is one NASTY commit!

Here I add ReturnMapUtils, and CPPUNIT-style tests of it.  The
point of ReturnMapUtils is to solve the NASTY linear system
that is created during the Newton-Raphson process of the
plastic return-map algorithm.  I made a namespace so that i
could most easily test this using CPPUNIT separately to any
plasticity stuff

Part of #3573
Added FiniteStrainPlasticBase which is really the
heart of this sequence of commits.  Hopefully it is
a general baseclass that can be used for all plasticity
models

As an example, FiniteStrainWeakPlaneTensile has been
re-factored to use this baseclass

Part of #3573
Refactored FiniteStrainWeakPlaneShear to use FiniteStrainPlasticBase

Changed tests accordingly

Also removed some spaces at the end of lines

Addresses #3573
Substantially refactored FiniteStrainPlasticBase by including
most of ReturnMapUtils into it.

Also included a lot of debugging features that will be useful
for future developers to debug their plasticity models (eg,
debugging dyieldFunction_dstress).

Also reworked calculateConstraints, calculateRHS, etc, so that
the code is more clear (might be slightly less efficient this
way, but that's too bad for now).

Altered tests so they crash if max_iterations is exceeded or
the line search fails.
Removed ReturnMapUtils and its tests.  Fixes #3573
Unsigned integer comparisons fixed.  Fixes #3573

Also renamed dirn by epp, and changed the input-file string
direction_tolerance to ep_plastic_tolerance
Merge pull request #3592 from WilkAndy/nr_util_3573

Large commit - base class for TensorMechanics plasticity + extras
Merge commit 'bdc64e2a2fb5767eed70928c9c84c7efbba605ef'
Fixing tests:

- Fixing input files (need to do gold files)
- Fixing stateful_prop_test_older
- Fixing constant scalar sux test
- Updating material_test
- Fixing stateful_prop test
- Fixing test/tests/materials/stateful_prop/gold/out_older.csv
- Fixing named_entities test
- Fixing out-of-array access in MaterialPropertyUserObject
- Fixing steteful_prop.test_csv
Fixup additional tests
Change legacy aux flag to false
refs #2172
Small bugfix for input file option
Fix legacy message
refs #2172
Turn of legacy flag in modules, fixup tests
refs #2172
added LLDB and GDB class handlers to obtain stack traces. LLDB for Darwin, GDB for Linux. refs #3616
I found a case when lldb has exited while I was still trying to send commands to it. refs #3616
Fix bug with not having FaceMaterials inited on boundaries unless a BC was active
closes #3586
Merge pull request #3617 from milljm/memory_logger-lldb

added LLDB and GDB class handlers to obtain stack traces
Merge pull request #3613 from permcody/fix_moose_legacy_aux

Fix moose legacy aux
Merge commit '08914a0fb55b693633e28e2437289b2aa4a609ea'
Merge commit '0b0b41b3f2b805bf311f35824e2b54b71b2b7e32'