removed Tao use of antediluvian PETSC_C_BEGIN/END with PETSC_EXTERN for Tao implementation class constructors

separate total TAO ksp count from per-iter count

TAO: Enable interface for complex scalar builds

docs: fix errors of type:
manualpages in: /sandbox/petsc/petsc.clone/src/tao/unconstrained/impls/nls
make[7]: [manualpages] Error 1 (ignored)

tao: documentation update

add a tao solver page to man pages for each solver (could be filled in a bit more)

add tao solver table and start to write solver man pages

removed outdated docs and comments on MatStructure usage
removed SAME_PRECONDITIONER since no longer used
removed unneed use of MatStructure in Schur complement matrix

removed MatStructure arguments from Tao

KSPSetOperators() no longer has the MatStructure argument. The Mat objects now track that information themselves. Use KPS/PCSetReusePreconditioner() to prevent the recomputation of the preconditioner

KSPSetOperators() no longer has the MatStructure argument. The Mat objects now track that information themselves. Use KPS/PCSetReusePreconditioner() to prevent the recomputation of the preconditioner if the operator changed in the way that SAME_PRECONDITIONER did with KSPSetOperators()

SNES/TS still need to be cleaned up to better utilize the new interfaces

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completed cleanup of removal of matrix pointers to compute jacobian routines

update changes file

fixed tao examples to no longer use Mat* arguments for Jacobian/Hessian etc computations

fix Tao unconventional naming of TAOLINESEARCH_XXX_CTX TAOLINESEARCH_MT etc

fix some VecGetArray() to VecGetArrayRead() and const in Tao source code

changed TaoTerminationReason TaoConvergedReason
changed TaoLineSearchTerminationReason to TaoLineSearchConvergedReason

reason: consistency with the rest of PETSc

updates to Tao per request of Lisandro for Petsc4py

* I would like to have TaoGetConstraintTolerances(), right now I'm
defining it in petsc4py as shown in the link below:
https://bitbucket.org/petsc

updates to Tao per request of Lisandro for Petsc4py

* I would like to have TaoGetConstraintTolerances(), right now I'm
defining it in petsc4py as shown in the link below:
https://bitbucket.org/petsc/petsc4py/commits/ab01ebe336491190a2db85c179c48b1c64fdc673?at=master#chg-src/include/custom.h

* Look at all these definitions, they should be exposed in the C API
to be able to call e.g. TaoSetType(tao,TAOLMVM);
https://bitbucket.org/petsc/petsc4py/commits/ab01ebe336491190a2db85c179c48b1c64fdc673?at=master#Lsrc/PETSc/petsctao.pxiT4

Also removed -tao_method, removed tao_ from names of tao methods and fixed some tao source code formatting

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fixes after merge with master due to DMDA_BOUNDARY -> DM_BOUNDARY

fortran definitions of MPI_INTEGER etc were wrong for MPIUNI thus giving wrong results for tao fortran examples that used them in MPI_Allreduce()

support for MPIU operations for quad precision in Fortran now works

docs: fix 'Concepts' keyword in tao examples

remove wierd handling of options and options prefixes in Tao

fixed more Tao print format statements

set tao tolerances for single precision

BTW: there are all kinds of crazy tolerances all over the place; needs to be rationalized

fixes to tao to compile in single precision

changed TaoSolver usage to Tao

removed taoinitialize and taofinalize