PCBDDC: Remove aliased parameters from GEMM calls.

Improved readibility

PCBDDC: Remove aliased parameters from GESVD calls

PCBDDC: Remove aliased parameters from SYEV calls.

Improved readibility

PCBDDC: protect queries to lapack GESVD/SYEV when there are no edges or faces (1D)

PCBDDC: Move setup of local scatters into a routine

PCBDDC: Setup of local matrices moved into a separate routine into bddcprivate.c

PCBDDC: better management of local matrices among repeated solves

PCBDDC: move setup of local solvers into a routine into bddcprivate.c

PCBDDCSetUseExactDirichlet moved accordingly

PCBDDC: create local solvers once. Reuse them during repeated linear solves

Destroy routines moved outside ResetSolvers routine.

PCBDDC: Added orthonormalization routine

nullspace code changed accordingly

PCBDDC: Less tricky loop on constraints when changing the basis

PCBDDC: Constraints setup improved

- Change of basis is now performed using QR factorization of constraints
- Added missing support for complexes when PETSC_MISSING_GESVD is defined
- Improved co

PCBDDC: Constraints setup improved

- Change of basis is now performed using QR factorization of constraints
- Added missing support for complexes when PETSC_MISSING_GESVD is defined
- Improved code readability

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PCBDDC: bugfix when multiple constraints are present on the same connected component

Local to global mapping of coarse dofs was badly computed

Merged petsc/petsc into rmills/petsc master.

Merge branch 'stefano_zampini/pcbddc-for-complexes'

* stefano_zampini/pcbddc-for-complexes:
PCBDDC: Solved compilation errors and warnings for complex builds

Merge branch 'stefano_zampini/pcbddc-development'

Conflict with 'jed/matnullspaceremove-inplace', resolved using:

$ git merge -X theirs --no-commit stefano_zampini/pcbddc-development
$ git grep

Merge branch 'stefano_zampini/pcbddc-development'

Conflict with 'jed/matnullspaceremove-inplace', resolved using:

$ git merge -X theirs --no-commit stefano_zampini/pcbddc-development
$ git grep -l MatNullSpaceRemove src/ksp | xargs perl -pi -e 's@(MatNullSpaceRemove\([^,]+,[^,]+),NULL\)@$1)@'
$ git commit -a

* stefano_zampini/pcbddc-development:
PCBDDC: add wrappers for PetscStackCallBLAS
PCBDDC: Final fix for locally periodic problems
PCNNCreateCoarseMatrix: fix allocation error
PCIS: consider myself as a neighbor when classifying interface nodes
PCBDDC: Remove misuses of neighbours_set in FETI-DP code
PCBDDC: Coarse solution lives in the span of phi (not psi)
MATIS: Add IsSymmetric and IsHermitian implementations
PCBDDC: More robust method to compute local boundary nodes
PCBDDC: Add partial support for periodic problems replacing Sort with RemoveDups
PCBDDC: Add support for non-symmetric linear systems
PCBDDC: Stiffness scaling should be rebuilt in any case (just to be safe)
PCBDDC: Remove trailing blanks
PCBDDC: Consistency of CSR graph passed in postponed to PCSetUp
PCBDDC: Preliminary work to split PCBDDCCoarseSetUp in simpler pieces
PCBDDC: allow compilation without metis header
PCBDDC: Optimal allocation in PCBDDCGetPrinalVerticesLocalIdx
PCBDDC: add verbosity level to graph view
PCBDDC: change boolean debug flag to integer -pc_bddc_check_level
PCBDDC: Workaround for BAIJ local matrices: convert to AIJ for coarse matrix
PCIS: Use PETSC_COMM_SELF instead of MPI_COMM_SELF
PCBDDC: many changes
ISG2LMapApply: fix __FUNCT__ and invalid access before globals are set up

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PCBDDC: Solved compilation errors and warnings for complex builds

Example code changed by using LAPACK steqr method.

PCBDDC: add wrappers for PetscStackCallBLAS

PCBDDC: Final fix for locally periodic problems

Added mirrors to graph structure

PCBDDC: Coarse solution lives in the span of phi (not psi)

PCBDDC: Add support for non-symmetric linear systems

PCBDDC: Remove trailing blanks

PCBDDC: Consistency of CSR graph passed in postponed to PCSetUp

CSR graph is freed if the PC type is not PCBDDC and PETSC_OWN_POINTER
has been requested.

(Thanks to Lisandro Dalcin to report on thi

PCBDDC: Consistency of CSR graph passed in postponed to PCSetUp

CSR graph is freed if the PC type is not PCBDDC and PETSC_OWN_POINTER
has been requested.

(Thanks to Lisandro Dalcin to report on this)

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PCBDDC: Optimal allocation in PCBDDCGetPrinalVerticesLocalIdx

PCBDDC: add verbosity level to graph view