Clean up a few compiler warnings

Plex: Can now load HDF5 using DMPlexCreateFromFile()

Plex: Make return values optional

Plex ex3: Allow convergence tests using coarsening

Plex: Added DMPlexComputeInterpolator_General()

Plex: Added DMPlexGet/RestoreClosureIndices()

Update the calls to DMViewFromOptions

Merge branch 'knepley/feature-patrick-control-problem' into knepley/feature-snes-deflation

* knepley/feature-patrick-control-problem:
TAO ex2: Add optimal control problem from Patrick
TAO ex1: F

Merge branch 'knepley/feature-patrick-control-problem' into knepley/feature-snes-deflation

* knepley/feature-patrick-control-problem:
TAO ex2: Add optimal control problem from Patrick
TAO ex1: Fix docs
Plex: Fix bug with bcComps initialization

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Merge branch 'master' into knepley/feature-snes-deflation

* master: (32 commits)
MatGetSubmatrix() could hang when some processes thought the entire matrix as being selected and others did not.

Merge branch 'master' into knepley/feature-snes-deflation

* master: (32 commits)
MatGetSubmatrix() could hang when some processes thought the entire matrix as being selected and others did not.
PetscOptionsStringToScalar() and hence PetscOptionsScalarArray() did not work correctly for complex numbers with negative imaginary part
Have SNESCOMPOSITE honour -snes_max_fail for the number of inner solver failures it will tolerate.
fiat: add fallback url
added Stefano and Lisandro to PETSc authors list updated PETSc version number to 3.6 and year of publication to 2015 in the users manuals
deeper cleanup of matrix when the type is reset
need to call KSPSetFromOptions() after KSPSetOperators() so that command line null space is attached to correct matrix updated example output for null space not attached to KSP
Doc: Acknowledge Patrick
bugs in example that should never have gotten into next bug in code calling VecGetArray() on read only vector
doc: seperate -> separate
configure: help - prevent from printing duplcate sections - all PACAKGENAMEs should be CAPS
remove C99 code from example update output from example
updated list of PETSc enum objects that bfort will treat as native for generating Fortran stubs
-help would print the various -xxx_type values on multiple lines making a | grep -ksp_type (for example) not list all the possible options
fix memory leak as reported by the nightly tests
print help message for PetscOptionsGetViewer() the message is rather long
removed dead code about PETSc web server
removed unneeded custom XXXViewFromOptions() functions and updated to use PetscObject as second argument calling sequence
changed second argument of PetscObjectViewFromOptions() to PetscObject and all routines that use this routine
bugfix as reported by PETSc blame digest (next) 2015-05-25
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Plex: ASCII view now shows coarse meshes

Plex: Added DMCoarsenHierarchy_Plex()
- Responds to -dm_coarsen_hierarchy
- Can also coarsen multiple times now

Plex: Update the version of pragmatic used for coarsening.

Plex ex14: Allow loading a file

Plex: Remove debugging prints

Plex: Calculate metric for Pragmatic coarsening

Plex ex14: Added coarsening test

Plex: Correct allocation and numbering for Pragmatic calls

Plex: Add in coarsening using -dm_coarsen

Plex: Add trial Pragmatic interface

Merge branch 'tisaac/plex-fix-ex3-num-comp'

* tisaac/plex-fix-ex3-num-comp:
Plex ex3: number of components must be explicitly specified now

Plex ex3: remove bad DMDestroy() from TestFVGrad().

Plex + FV: Handle gradient reconstruction without ghost cells

removed unneeded custom XXXViewFromOptions() functions and updated to use PetscObject as second argument calling sequence

changed second argument of PetscObjectViewFromOptions() to PetscObject and all routines that use this routine

Plex: try to construct gradient in ex3

This is segfaulting right now, something about dm->dmsnes being set