DMPlex: refactor injector code for reuse

DMForestTransferVec_p4est(): shift work to plex

Merge branch 'master' into stefano_zampini/feature-pcbddc-saddlepoint

Conflicts:
src/ksp/pc/impls/bddc/bddc.c
src/ksp/pc/impls/bddc/bddcgraph.c
src/ksp/pc/impls/bddc/bddcprivate.c

Merge branch 'tisaac/dmp4est-feature-injection'

Merge branch 'master' of bitbucket.org:petsc/petsc

Merge branch 'tisaac/dmp4est-feature-injection'

* tisaac/dmp4est-feature-injection: (27 commits)
DMP4est: linear solve regression tests
DMP4est: regression tests for exact interpolation/injectio

Merge branch 'tisaac/dmp4est-feature-injection'

* tisaac/dmp4est-feature-injection: (27 commits)
DMP4est: linear solve regression tests
DMP4est: regression tests for exact interpolation/injection
PetscDualSpace: create height subspaces at setup.
DMClone(): get agreement on cloning coordinates
DMP4est: bump number of procs in regression test
DMP4est: fix memory leaks
DMP4est: added diagnostic views
DMP4est: adding regression tests
SNES tutorials ex12: added RUN_EXACT, solve from exact solution
DMPlex: memory clean up in Injector/InterpolatorTree routines
DMP4est: use DMCoarsen_Forest
DMPlexComputerInterpolatorTree(): restore another work array
DMPlexAnchorsModifyMat(): restore work arrays
DMPlexComputeInjectorTree(): fix local / off-process bounds
DMPlexComputeInjectorTree(): more fixes
DMPlexComputeInjectorTree(): fix coarse/fine char mixup
DMPlexComputeInjectorTree() compiles
WIP: DMPlexComputeInjectorTree()
Plex tests ex3: added regression tests for injectors
DMPlex tests ex3: fix viewing, creating injectors
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suppress gcc -O warnings.

Merge branch 'tisaac/fix-static-analysis-warnings'

* tisaac/fix-static-analysis-warnings:
Add missing CHKERRQ
Address static analysis warnings

a few more set but not used variables detected by clang static analyzer

Time: . 1 hours

DMPlex: memory clean up in Injector/InterpolatorTree routines

Address static analysis warnings

DMPlexComputerInterpolatorTree(): restore another work array

DMPlexComputeInjectorTree(): fix local / off-process bounds

FAS regression check almost works except for dm work array checked
out...

DMPlexComputeInjectorTree(): more fixes

DMPlexComputeInjectorTree(): fix coarse/fine char mixup

DMPlexComputeInjectorTree() compiles

WIP: DMPlexComputeInjectorTree()

DMPlex: fix indexing in reference tree injector creation

DMP4est: finish DMPlexComputeInjectorReferenceTree

WIP

Merge branch 'master' into stefano_zampini/feature-pcbddc-saddlepoint

DMP4est: skeleton for creating injection

Merge branch 'master' into knepley/feature-plex-handle-func-failure

* master: (378 commits)
SNES ex5: Fix coordinate determination for empty subdomains
fixed petsc.bib entry
p4est: fix syntax

Merge branch 'master' into knepley/feature-plex-handle-func-failure

* master: (378 commits)
SNES ex5: Fix coordinate determination for empty subdomains
fixed petsc.bib entry
p4est: fix syntax error with error message
SNES ex5: Correct Jacobian handling on patches
SNES ex5: Stupid complex fixes
DMP4est: fix transfer of labels to parents
petsc4py: update to latest snapshot. Fixes da example breakage in petsc4py test suite
Plex: Correct setting of options on refined or coarsened meshes
Plex: Add info for grid hashing
Plex: Add logging in interpolator creation
Plex: Correct use of tabs in ASCII viewer
DM: Shorten long event name
Plex ex12: Create boundary label automatically at all levels of mesh hierarchy
Plex ex12: Change PetscViewerSetFormat --> PetscViewerPushFormat - Fix order of SetMode and SetFilename
Plex ex12: Change all functions to static
Since DMDA with periodic boundary conditions does support P0 interpolation remove checks that error out under those conditions
ascem-io.py and amanzi.py need to handle self.hdf5.include being None correctly
fix MPI Uni to recycle communicators so it won't run out like with the petsc4py tests also fix check for location of python shared library on mac to check all cases each time
Switch back to Sherry's version since she accepted by pull request
PetscDraw: Update help messages for -draw_save* options
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Conflicts:
src/dm/impls/plex/plexfem.c

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Merge branch 'tisaac/dmforest'

* tisaac/dmforest: (36 commits)
DMP4est: fix transfer of labels to parents
DMPlexCreateInterpolatorTree: fix handling of global dofs (can be < 0)
DMPlexComputeIn

Merge branch 'tisaac/dmforest'

* tisaac/dmforest: (36 commits)
DMP4est: fix transfer of labels to parents
DMPlexCreateInterpolatorTree: fix handling of global dofs (can be < 0)
DMPlexComputeInterpolatorTree(): fix workspace size
DM: warn when no injection implemented
DMPlexComputeInterpolatorTree(): use row layout to preallocate
DMP4est: all processes agree on root type
DMPlexComputeInterpolatorTree(): valgrind fixes
DMP4est: reset childID if anctecedent is not parent
DMP4est: send labels from children to parents and bcast
DMForest: added DMForestGetAdaptivityPurpose()
DMP4est: enable caching of results of DMPforestGetTransferSF()
Plex: fix empty partition errors
DMPforestGetTransferSF_Internal(): handle different type roots on different processes
DMP4est: broadcast labels when transfering for agreement
PetscSFBasic: fix usage of MPI_Reduce_local
DMPforestLabelsInitialize(): search through parents when finding a point in the closure
DMP4est: try to connect high strata points when transfering
DMP4est: can't use PetscSFCreateSectionSF. It compresses when we don't want to
DMP4est: expand transfer sfs by the CellSF
DMP4est: add DMForestCreateCellSF_p4est
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Merged petsc/petsc into master