TAO: Fixes for complex scalars in src/tao/matrix

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)

many fixes to build on Ios
-include ios project file that never properly got in repository
-remove lots of dead Tao code that was not handled by any compiler
-cleanup directions for ios builds

Merge branch 'sarich/tao-purge-dm'

remove taodm from headers

fix viewer issues in tao and taolinesearch

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

Merge branch 'jed/dmda-memusage'

remove DMDAGetGlobalIndices() since handled by DMGetLocalToGlobalMapping() followed by ISLocalToGlobalMappingGetIndices()
fixed cases where bs of ISLocalToGlobalMapping in Mat did not match matrix bl

remove DMDAGetGlobalIndices() since handled by DMGetLocalToGlobalMapping() followed by ISLocalToGlobalMappingGetIndices()
fixed cases where bs of ISLocalToGlobalMapping in Mat did not match matrix block size

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Merge branch 'knepley/feature-fe-dg-space'

* knepley/feature-fe-dg-space: (38 commits)
DMPlex: Added coordinate field info for generated mesh
DMPlex: Update to new DMPlexGetBoundary() interface

Merge branch 'knepley/feature-fe-dg-space'

* knepley/feature-fe-dg-space: (38 commits)
DMPlex: Added coordinate field info for generated mesh
DMPlex: Update to new DMPlexGetBoundary() interface
PetscFE: Fix complex casting
DMPlex: Fixup type mismatch in PetscFEIntegrate()
DMPlex ex62: Fixed test output
SNES ex62: Added test output
SNES ex62: Added tests for Q2-Q1 and Q2-P1disc - Added -show_error - Removed spurious refinement of quads - Fixed cast - CreatePressureNullspace() now uses DMPlexProjectFunction() - Replace SetupElement() with PetscFECreateDefault()
DMPlex ex3: Added tests for P1disc
SNES ex12: Updated to new PetscFECreateDefault()
PetscFE: Fixes for discontinuous elements
PetscSpace: Fixed polynomial space view
PetscFE: Changed PetscFECreateDefault() - Now continuity and reference cell shape are set from the command line
PetscFE: Added domain integration - Added PetscFEIntegrate(), only implemented for Basic - Added DMPlexComputeIntegralFEM() and DMPlexComputeL2FieldDiff() - This should replace the L2Diff functions
Mat+Doc: Fixed MatNullSpaceRemove()
SNES ex62: Updated to new PetscFECreateDefault()
SNES ex12: Updated to new PetscFECreateDefault() - 3D simplex moves the P_0 point from the centroid
DMPlex ex3: Updated for corrected cell dof
PetscFE: I think I finally fixed the cell dof
DMPlex ex3: Added test case for P1disc on a quad
DMPlex ex3: Added P1 discontinuous test - Something looks wrong with interpolation
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tao: fix lcl 0d8 descent check

make sure example does not send uninitialized data through MPI to confuse valgrind

make sure no initialized data is sent via MPI to confuse valgrind

TAO ex1: documentation

TAO ex1: Now we have a full optimal control problem
- The data for the state is perfect (Q is I)
- The regularization is perfect (L is I and a_ref is the exact control)

TAO ex1: Constructed saddle point problem, but control is given exactly

TAO ex1: Starting an IPM example

Merge branch 'sarich/fix-tao-pounders-memory'

Merge branch 'sarich/fix-mtlinesearch'

tao fix memory issue discovered through valgrind

tao: revert tron changes, change should be made in stcg

tao: fixed - allow various ksp solvers in tron