Add option to NumNonlinearIterations to accumulate over step ref#4052

Added new option “accumulate_over_step” to the NumNonlinearIterations
Postprocessor.  When set to true, this returns the sum of the nonlinear
iterations for all Picard iterations in a step.
Fix formatting indices present in python 2.6.
Change the way the tests.cluster file is generated
to handle multiple runs of the same test. We
were appending more jobs to the same file, thus
causing collisions. References #4222
remove the dumb print output statement... #4223
Add check in CrackFrontData for whether crack front node exists, also fix problem with infinite loop for crack front with only two nodes refs #4161
Make DomainIntegralAction create VectorOfPostprocessors for 3D J-integrals closes #4228

Also convert two of the tests over to checking the CSV output generated by this.
Merge pull request #4224 from backmari/crack_front_issues

Check whether crack front node exists in CrackFrontData
Merge pull request #4229 from bwspenc/fracture_integral_vector

Make DomainIntegralAction create VectorOfPostprocessors for 3D J-integrals
Fixing compiler detection in test harness

The test harness was using the 'libtool --cxx' to detect the compiler.
However, this is not a valid option. We have to use
'libmesh-config --cxx' for this.

Closes #4321
Merge pull request #4223 from milljm/pbs_python26

Fix formatting indices present in python 2.6.
Generalizing the execution routines

Introducing a general routine to run a binary from libmesh.
Update find_hung_process.py to work with Falcon or Bechler clusters
closes #4216
Merge pull request #4232 from andrsd/compiler-detection-fix

Fixing compiler detection in test harness
Merge pull request #4220 from permcody/hung

Update find_hung_process.py to work with Falcon or Bechler
ElementReadPropertyFile User Object src and test #4066

Added comments to .C and .h files #4066
Merge pull request #4219 from cpritam/feature_4066

ElementPropertyReadFile src and test #4066
add another search path for libmesh-config refs #4234
Merge pull request #4236 from friedmud/libmesh_config_4234

add another search path for libmesh-config
Obtain and use DOF map (#4182)
Add WrongJacobianDiffusion kernel (#4182)
Add tests (#4182)