Merge branch 'barry/fix-private-functions'

MatSeqDense: added MatZeroRowsColumns implementation

PetscDraw: Explicitly save draw in {Vec|Mat|DMDA}View() routines

PetscDraw: Fix MatView() for MAT{SEQ|MPI}{[S|SB]AIJ|DENSE}

made a few more private symbols private
make checking for turning on symbol visibility the default

More decreasing visibility of symbols from outside libraries
Also fix a few bugs related to having multiple PETSc libraries

labeled a variety of additional internal functions as static
to prevent them from being publically available in the library

PetscDraw: Add utility routine PetscDrawRealToColor()

Merge branch 'barry/better-matsetoption-error'

Print a better error when someone sets a MatOption that that matrix is not ready for yet.

Reported-by: Mark McClure <mark.w.mccl@gmail.com>

MatSeqDense: remove unneeded check

MatSeqDense: added PtAP support for P dense and A either SeqAIJ or SeqDense

Deprecate PetscViewerSetFormat() since it better to use PetscViewerPush/PopFormat() and using
PetscViewerSetFormat() can lead to confusing situations for users when later viewers do not recognize the

Deprecate PetscViewerSetFormat() since it better to use PetscViewerPush/PopFormat() and using
PetscViewerSetFormat() can lead to confusing situations for users when later viewers do not recognize the set
format and thus do not produce any information.

Reported-by: Jed Brown <jed@jedbrown.org>

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add row/col orientation to MatConvert_Elemental_Dense

add columnoriented option to MatSetValues_Elemental()

Merge remote-tracking branch 'origin/hzhang/matmatmult_dense'

add MAT_REUSE_MATRIX to MatConvert_Elemental_Dense()

add MAT_REUSE_MATRIX to MatConvert_MPIDense_Elemental()

MatMatMult_MPIDense_MPIDense() requires elemental

MatMatMult_MPIDense_MPIDense() requires elementa

rm // for nightly tests

add MAT_INPLACE_MATRIX; replace MAT_REUSE_MATRIX with it for MatConvert()

add MatMatMult_MPIDense_MPIDense() via Elemenetal

Merge branch 'barry/add-mpiu_allreduce'

Merge branch 'hzhang/mattransmatmult_dense'