Merge branch 'stefano_zampini/few-fixes-before-release'

doc fixes

PCBDDC: yet two places to propagate the right vector type

PCIS: propagate local vector type to subvectors

Merge branch 'knepley/feature-pc-patch'

fix memleaks flagged by valgrind

# > ==29645== 312 (40 direct, 272 indirect) bytes in 1 blocks are definitely lost in loss record 3 of 3
# > ==29645== at 0x4C2CC70: calloc (in /usr/lib/valgrind/v

fix memleaks flagged by valgrind

# > ==29645== 312 (40 direct, 272 indirect) bytes in 1 blocks are definitely lost in loss record 3 of 3
# > ==29645== at 0x4C2CC70: calloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
# > ==29645== by 0x63009A0: kh_init_HSetI (hashseti.h:6)
# > ==29645== by 0x63015BA: PetscHSetICreate (hashseti.h:6)
# > ==29645== by 0x630F621: PCPatchCreateCellPatchDiscretisationInfo (pcpatch.c:857)
# > ==29645== by 0x6317E86: PCSetUp_PATCH (pcpatch.c:1426)
# > ==29645== by 0x632A345: PCSetUp (precon.c:932)
# > ==29645== by 0x6475DDA: KSPSetUp (itfunc.c:391)
# > ==29645== by 0x647985E: KSPSolve (itfunc.c:723)
# > ==29645== by 0x661E5AA: SNESSolve_NEWTONLS (ls.c:224)
# > ==29645== by 0x6596F9A: SNESSolve (snes.c:4394)
# > ==29645== by 0x4139A7: main (ex62.c:676)

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Default BoomerAMG smoothers

Merge branch 'master' into knepley/feature-pc-patch

* master: (131 commits)
fix mpiuni test
PETSCFEOPENCL: declare PetscFEGetTabulation_Basic as external
PETSCFEOPENCL: declare PetscFESetUp_Ba

Merge branch 'master' into knepley/feature-pc-patch

* master: (131 commits)
fix mpiuni test
PETSCFEOPENCL: declare PetscFEGetTabulation_Basic as external
PETSCFEOPENCL: declare PetscFESetUp_Basic as external
one more fix
jenkins: run 'cleantest' after examples are run - to recover diskspace
logical order bug in diagbrdn update fixed, tests updated again
replace new -petscspace_order instances with -petscspace_degree
PETSCSPACETENSOR: clear up naming confusion of subspaces
regression.py: remove configure code related to old test suite - now that SLEPc no longer needs it
PetscSpaceSetup_Poly(): make idempotent
Plex ex3: update tests
Lift changes to defunct dtfe.c from [PR #1074]
PetscSpace_Tensor: clarification of vector-valued
PetscSpace_Tensor: allow height subspaces, fixes tabulation initialization
PetscSpace: add a dimension member
PetscSpaceSetDegree(): now take maxDegree argument
-petscspacepoly_tensor -> -petscspace_type tensor
PetscSpaceEvaluate_Polynomial(): fix temp array dependencies
PETSCSPACETENSOR: A generic tensor product of spaces.
PetscSpace: -petscspace_order -> -petscspace_degree
...

Conflicts:
src/dm/dt/interface/dtfe.c
src/snes/examples/tutorials/ex13.c
src/snes/examples/tutorials/ex17.c
src/snes/examples/tutorials/ex62.c
src/snes/examples/tutorials/output/ex62_bddc_quad.out
src/snes/examples/tutorials/output/ex62_fetidp_2d_quad.out
src/snes/examples/tutorials/output/ex62_fetidp_2d_tri.out
src/snes/examples/tutorials/output/ex62_fetidp_3d_hex.out
src/snes/examples/tutorials/output/ex62_fetidp_3d_tet.out

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FETIDP: fix corner case

PCMG: fix memory leak

KSPFETIDP: implement Olof's idea on using BDDC for the pressure preconditioner

PCBDDC: fix propagation of use_qr_single if there aren't constraints

PCBDDC: remove the correct nullspace

PCBDDC: add getters for primal vertices

PCIS: use the object comm for global ISs

PCBDDC: fix improper usage of %d and \n in prints

add missing ierr = .. CHKERRQ(ierr); where needed

PCBDDC: added option to control target globalcoarse size

- use BDDC API after KSPSetFromOptions if the coarse pc type have been changed at command line
- minor indentation fixes

PCBDDC/KSPFETIDP: update XXXView ops

PCBDDC: propagate options prefixes to inner solver matrices

this is to namespace factor prefixes, e.g

-pc_bddc_dirichlet_mat_mumps_whatever_option

instead of

-mat_mumps_whatever_option

PCBDDC: propagate the correct error_if_failure flags to inner solves

PCBDDC: no need for the change of basis matrix to be AIJ

PCBDDC: Raise error if preallocation is not exact

PCBDDC: add events

PCBDDC: 8 additional levels is more than enough

It can always be changed by modifying bddc.h or with CFLAGS=-DPETSC_PCBDDC_MAXLEVELS=whatever

PCBDDCSubSchurs: add command line option to play with communicator