Change CHKERRQ(ierr) after PetscInitialize() calls in examples to if (ierr) return ierr;

Since the PETSc initialization may not have been completed in the failed PetscInitialize() it is not
propper

Change CHKERRQ(ierr) after PetscInitialize() calls in examples to if (ierr) return ierr;

Since the PETSc initialization may not have been completed in the failed PetscInitialize() it is not
propper to call the PETSc error handling routines

Commit-type: bug-fix, testing-fix, example
Reported-by: jed Brown <jed@jedbrown.org>

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updates to Moab output, presumably the examples were not being run before
Commit-type: testing-fix
Reported-by: nightly tests

clean out the last of the old test harness artifacts

Commit-type: style-fix

Changed VecScatterCreate() to take a communicator and return scatter as other first class PETSc objects do.
Changed old VecScatterCreate() to VecScatterCreateWithData()

Completed basic refactorizati

Changed VecScatterCreate() to take a communicator and return scatter as other first class PETSc objects do.
Changed old VecScatterCreate() to VecScatterCreateWithData()

Completed basic refactorization of VecScatter code, ready for new implementations to be added.

(There is still some code duplication between the VecScatter MPI1 and MPI3 code but it can be fixed at anytime without requiring changes to the VecScatter API.

Part 5 of a refactorization of VecScatter to be treated as a first class PETSc object

Commit-type: style-fix

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Move MOAB docs to submansec so as not to clutter DM mansec

Commit-type: documentation

examples: add compile target 'ex%: ex%.o' etc - and remove the corresponding dups