Added new MatView() method for KAIJ, tailored specifically for KAIJ.

Updated manual pages for MatCreateKAIJ() and MATKAIJ.

Replaced some loops with PetscMemzero() and PetscMemcpy() calls.

We never say "sorry" in PETSc. =)

Put back conditional around PetscFree(T) in MatSetUp_KAIJ() that was mistakenly removed.

Eliminated "_N" and "_dof" naming of KAIJ MatMult family of methods.

Removed unused row entry information from S loop in MatMultAdd_SeqKAIJ().

Renamed KAIJMultAdd_* functions to be consistent with PETSc naming conventions.

Added note about matrices S and T being copied in their respective set routines.

MatKAIJSetAIJ() now increases reference count of the AIJ matrix.

Previously, this was being done in MatSetUp_KAIJ(), but we want to avoid
potential problems with the user destroying the AIJ matrix b

MatKAIJSetAIJ() now increases reference count of the AIJ matrix.

Previously, this was being done in MatSetUp_KAIJ(), but we want to avoid
potential problems with the user destroying the AIJ matrix between the set
call and the matrix setup.

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Added read-only variants of MatKAIJGetS()/T() and corresponding restore functions.

Removed unnecessary checks before PetscFree() and made minor formatting fixes.

Error handling fix in MatKAIJGetAIJ().

Changed PetscMalloc() to PetscMalloc1() calls; fixed incorrect use of PetscMalloc3().

Fixed bug in MatGetRow_SeqKAIJ() due to array v not being initialized to zero.

Fixed bug in MatGetRow_MPIKAIJ() due to array v not being initialized to zero.

Fix another warning about possible uninitialized use of 'diag'.

Fix warning about possible uninitialized use of 'diag'.

Fixed warning about extra semicolon in struct using KAIJHEADER.

Fixed code accidentally left commented out.

Fixed missing cast to Mat_MPIAIJ*.

Change VecScatterCreateWithData() call back to VecScatterCreate().

Broke up monolithic MatCreateKAIJ(); added APIs for setting each part of a KAIJ.

Removed an extra blank line.

MATKAIJ: Fixed simple style and documentation issues noted by Barry and Jed.

Helped-by: Barry Smith <bsmith@mcs.anl.gov>, Jed Brown <jed@jedbrown.org>