improve the memory usage of PCGAMGCreateGraph()

Merge branch 'hzhang/mumps-bugfix' into maint

Mat doc: fix mismatches between Mat name and man page

Reported-by: Sven Heinrich <s.heinrich@tu-braunschweig.de>

bugfix for memory leak with >1 processes and calling KSPSetOperators(A) twice with same A
(see Jose Roman's email on Jul 11, 2014)

ISStrideGetInfo() was called on non-ISSTRIDE IS

Reported-by: Tabrez Ali <stali@geology.wisc.edu>

When compressed rows are used in MatMult_SeqAIJ, the values of the output vector that aren't updated should be set to zero,

Reported-by: Tobin Isaac <tisaac@ices.utexas.edu>

mkl_pardiso: change -pc_factor_mat_solver_package from pardiso to mkl_pardiso [and other names]

mkl_pardiso: rename sourcefiles/dirs as mkl_pardiso

Added support for mkl-pardiso
also rebase to latest petsc-master [and fix -ksp_view]

matlab: fix test example options

fixes for destroying Matredundant

Merge branch 'maint'

need to call MatDestroy_MatRedundant() for SeqAIJ destroy also

fixed memory leak for MatGetRedundant

Reported-by: Jose Roman <jroman@dsic.upv.es>

suitesparse: There is no suitesparse-enable-klu option.

Merge branch 'hzhang/mumps-options'

fix Fortran problem for MUMPSGetXXX() routines

Merge branch 'hzhang/mumps-options'

added MatFindOffBlockDiagonalEntries() for MPIAIJ so that -pc_fieldsplit_detect_coupling can be used in parallel
optimized fieldsplit for 2 splits with multiplicative, less expensive residual computa

added MatFindOffBlockDiagonalEntries() for MPIAIJ so that -pc_fieldsplit_detect_coupling can be used in parallel
optimized fieldsplit for 2 splits with multiplicative, less expensive residual computation and remove unneeded MatGetSubMatrix() for that case
optimized MatGetSubMatrix() for request of entire matrix

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Merge branch 'knepley/fix-mat-missing-diagonal'

bugfix contributed by Jose Roman

check misssing diagonal for PETSc cholesky symbolic factorization

check misssing diagonal for PETSc ilu and lu symbolic factorization

Merge branch 'hzhang/mumps-options'

update MatView_MUMPS()