cleanup MatTransposeMatMult_MPIAIJ_MPIAIJ(): use Elist for options on experimental algorithms

cleanup MatPtAP_SeqAIJ_SeqAIJ(): use Elist for options on experimental algorithms

rename MatMatMultSymbolic_MPIAIJ_MPIAIJ_Scalable -> MatMatMultSymbolic_MPIAIJ_MPIAIJ because this routine is default

Merge branch 'barry/fix-minor-matlabs'

badly formatted /*I "include" I*/, unused variables fixed that compile with MATLAB

cleanup MatMatMult_MPIAIJ_MPIAIJ(): use Elist for options on experimental algorithms
rename MatMatMultSymbolic_MPIAIJ_MPIAIJ -> MatMatMultSymbolic_MPIAIJ_MPIAIJ_nonscalable (non-default)

cleanup MatMatMult_SeqAIJ_SeqAIJ(): use Elist for options on experimental algorithms

Merge branch 'hzhang/mattransposematmult'

Conflicts:
src/mat/examples/tests/makefile

Merge branch 'barry/fix-PetscObjectPrintClassNamePrefixType'

* barry/fix-PetscObjectPrintClassNamePrefixType:
update tests of src/mat/examples/tests/ex136.c
Use classname in object for object na

Merge branch 'barry/fix-PetscObjectPrintClassNamePrefixType'

* barry/fix-PetscObjectPrintClassNamePrefixType:
update tests of src/mat/examples/tests/ex136.c
Use classname in object for object name when calling PetscObjectPrintClassNamePrefixType() instead of some string with less precise name passed in

Conflicts:
src/snes/interface/snes.c

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update tests: -matptap_sparseaxpy has been replace with -matptap_scalable

Merge branch 'hzhang/mat-coloring'

Merge branch 'karlrupp/feature-viennacl'

rename Mat_MatMatTransMult *art -> *abt; *multtrans -> *abt

remove container from MatMatTransposeMult_SeqAIJ_SeqAIJ()

cleanup, add tests

cleanup matmatmult.c

rm #define RART_PROFILE from matrart.c

rename '-use_rart' for Gmat with '-Guse_rart'; add obj to ElistOptions

replace previous impl of '-matden2sp_brows >0' with the new one which only checks non-zeros of Cden in MatTransColoringApplyDenToSp_SeqAIJ()

optimize MatTransColoringApplyDenToSp_SeqAIJ() for the case '-matden2sp_brows -1'

add a new implementation of '-matrart_brow' with matrix coloring: only loop over
sparse non-zeros entries of C_dense.

bugfix for the case brows=0

cleanup routines for MatTransposeColoring; set MatTransposeColoring->brows>0 as default

implement MatTransColoringApplyDenToSp_SeqAIJ() with rowblock-wise sweeping which shows 40% faster for pflotran tests

trivial cleanup of MatTransposeColoringCreate_SeqAIJ