Merge branch 'barry/fix-options-default'

Conflicts:
src/ksp/ksp/examples/tutorials/ex52.c

rm xtoy, XtoY, previously used for MatAXPY, case SUBSET; add a test contributed by Jose Roman

Added MatForward/BackwardSolve for SeqBAIJ block size 1-3 natural ordering
Added testing for them in already existing test code

update use of PetscOptionsBool() to not rely on default setting automatically

rename MatCreateMPIBAIJConcatenateSeqBAIJ() to MatCreateMPIMatConcatenateSeqMat()

mv struct 'Mat_Redundant' to '_p_Mat’ for simplify codes

compile: fixes for windows/solaris

add MatGetRedundantMatrix_MPIBAIJ() -- almost same as MatGetRedundantMatrix_MPIAIJ()

MatCreateMPIBAIJConcatenateSeqBAIJ() works for bs>1

added test to manual pages clarifying what row and column Mat blocksize actually mean
someone added them without any regard for how confusing it would be to users

reduce code duplication for MatAXPYGetPreallocation_SeqXXX()

bugfix for MatAXPY_ for mpibaij and mpisbaij

bugfix for MatAXPY_ for seqbaij and seqsbaij

Mat doc: fix mismatches between Mat name and man page

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

check misssing diagonal for PETSc cholesky symbolic factorization

check misssing diagonal for PETSc icc symbolic factorization; bugfix for MatMarkDiagonal_SeqSBAIJ()

check misssing diagonal for PETSc ilu and lu symbolic factorization

Mat: Fix MatMissingDiagonal_SeqAIJ
- diag[] indicates a missing diagonal element by storing the offset of the first column of the next row

Merge branch 'jose/mataxpy-state'

* jose/mataxpy-state:
MatAXPY_Elemental: increment state
Increase object state in MatAXPY for all matrix formats
Increase state in MatHeaderReplace

Increase object state in MatAXPY for all matrix formats

doc: fix getpdflabels to count manual chapters correctly.
Also fix URLs from man pages to manual.pdf

removed limited support for passing NULL values pointer to MatSetValues() since it was implemented only by AIJ and never used.
Now all matrix types generate suitable error when values is null

changes to examples due to objects always printing class and name information