MatSetBlockSizes: create new layouts if they are referenced from other objects

MatSetBlockSize: avoid duplicated code, use MatSetBlockSizes(M,bs,bs)

Merge branch 'barry/improve-matnullspace-usage'

Merge branch 'stefano_zampini/feature-convert-matnest-matis' into stefano_zampini/feature-pcbddc-saddlepoint

I have to merge it here, since there's an API addition for MatIS in stefano_zampini/featu

Merge branch 'stefano_zampini/feature-convert-matnest-matis' into stefano_zampini/feature-pcbddc-saddlepoint

I have to merge it here, since there's an API addition for MatIS in stefano_zampini/feature-pcbddc-saddlepoint
that prevents me to smoothly merge stefano_zampini/feature-convert-matnest-matis into next.

This will also facilitate merging stefano_zampini/feature-pcbddc-saddlepoint into master

Conflicts:
src/docs/website/documentation/changes/dev.html

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Mat: MatSetBlockSizes as a MATOP.

it allows to change the block sizes at a later stage.
For the block formats, the default op raise an error if the user tries to change them

MAT: introduce setlateblocksize function that allows to change the block size after matrix setup

Enhancements for KSP solve with singular matrices

update KSPSolveTranspose() to utilize the nullspaces attached to the matrix with MatNullSpaceSet()
add test examples that utilizes the singular matr

Enhancements for KSP solve with singular matrices

update KSPSolveTranspose() to utilize the nullspaces attached to the matrix with MatNullSpaceSet()
add test examples that utilizes the singular matrices nullspaces for KSPSolve() and KSPSolveTranspose() with
right and left preconditioning.
Lock vectors in MatNullSpaceCreate() so user doesn't accidently change them when they should not
Add details to KSPSolve() manual page for singular systems.

Thanks-to: Fande Kong <fande.kong@inl.gov>

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MatSetUp man page: typo fix

First attempt to allow changing the block size of a matrix (and any associated l2gmap)

CUSP,ViennaCL: Fixed ILU and Cholesky preconditioner fallback.

The new registration mechanism for matrix factorizations was not
applied for CUSP and ViennaCL, thus the default ILU preconditioners di

CUSP,ViennaCL: Fixed ILU and Cholesky preconditioner fallback.

The new registration mechanism for matrix factorizations was not
applied for CUSP and ViennaCL, thus the default ILU preconditioners did not work.
This commit adds the missing registrations for these packages.

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remove incorrect information in some manual pages, add more links to MatTransposeColoring() manual pages

Merge branch 'maint'

remove dead Adifor code

Time: .1 hours
Reported-by: Sebastien Gilles <sebastien.gilles@inria.fr>

typo MUSAT should be MUST, describing v as "logically 2 dimensional" makes sense only for block rows but that's not made clear
Time: 0 hours
Reported-by: Peter J. Puchyr <pjpuchyr@gmail.com>

Merge branch 'barry/get-factor-failure-information-from-mat'

Added MatFactorGetErrorZeroPivot()

Time: 2 hours
Reported-by: Glenn E Hammond <gehammo@sandia.gov>

MATNEST: implement MatDiagonalSet

Removed the use of PetscObjectQueryFunction() with with MatGetDiagonalBlock()

that I missed when I first converted MatGetDiagonalBlock() from a query function
to a table function

Time: .3 hours
Re

Removed the use of PetscObjectQueryFunction() with with MatGetDiagonalBlock()

that I missed when I first converted MatGetDiagonalBlock() from a query function
to a table function

Time: .3 hours
Reported-by: nightly tests

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add support for MatShellSetOperation(Mat,MATOP_GET_DIAGONAL_BLOCK, for Fortran

This required changing the handling of MatGetDiagonalBlock() from a query function based
method to a regular method in

add support for MatShellSetOperation(Mat,MATOP_GET_DIAGONAL_BLOCK, for Fortran

This required changing the handling of MatGetDiagonalBlock() from a query function based
method to a regular method in the function table

Time: .75 hours
Reported-by: Steven Dargaville <dargaville.steven@gmail.com>
Thanks-to: Dave May <dave.mayhem23@gmail.com>

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Update to patch commit 04545d6dccef0bc76f6a1a6548f816a384daa3de to make it work with master

Now the patch respects the data encapsulation of _p_Mat and does not access into it directly.

Time: .1 ho

Update to patch commit 04545d6dccef0bc76f6a1a6548f816a384daa3de to make it work with master

Now the patch respects the data encapsulation of _p_Mat and does not access into it directly.

Time: .1 hours

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