Merge branch 'barry/update-sowing'

Conflicts:
tutorials/HandsOnExercise.html

Merge branch 'tisaac/feature-gamg-extensible' into barry/experiment

Conflicts:
src/ksp/pc/impls/gamg/gamg.h

update to use Sowing 1.17
fixed many documentation errors as well

SNES: Added SNESSetSolution()
- This was necessary to test TS without solving

moved PetscOptionsObject from global variable to local variable in functions

manual merge of conflict

Merge branch 'pr232/pefarrell/snes-has-npc'
PR232

Merge branch 'master' into barry/ksp-converged-reason-viewer

Conflicts:
src/sys/objects/options.c

KSP/SNESMonitorLG prototype fixes in custom fortran interfaces

fix prototypes and casting for KSP/SNESMonitorLG.. routines and friends

previously the KSP and SNES LG norm monitoring routines crashes on -nox
Fixes this by keeping the PetscDraw object available and destroying it rather than obtaining it from the PetscDrawLG object
whi

previously the KSP and SNES LG norm monitoring routines crashes on -nox
Fixes this by keeping the PetscDraw object available and destroying it rather than obtaining it from the PetscDrawLG object
which did not work for -nox

show more ...

Changing -snes_converged_reason and -ksp_converged_reason to take a general viewer argument

SNES: reset linesearchregisterall in finalize

Remove XXXRegisterAllCalled from public interface.

All XXXRegisterAll() methods are now idempotent, so a boolean indicating
whether they can be called or not is no longer necessary.

Add SNESHasNPC.

Merge branch 'knepley/doc-snes'

* knepley/doc-snes:
SNESGS: Put in an explanation of the FD GS update
SNES: Add options database keys for norm schedule

# Please enter a commit message to explai

Merge branch 'knepley/doc-snes'

* knepley/doc-snes:
SNESGS: Put in an explanation of the FD GS update
SNES: Add options database keys for norm schedule

# Please enter a commit message to explain why this merge is necessary,
# especially if it merges an updated upstream into a topic branch.
#
# Lines starting with '#' will be ignored, and an empty message aborts
# the commit.

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SNES: Add options database keys for norm schedule

convert some PetscMalloc() to PetscMalloc1()
remove unneeded () in first argument to PetscMalloc/Calloc1()
fixes for MATLAB examples

Merge branch 'maint'

removed outdated documentation on no longer needed flag about matrix sparsity

Reported-by: Robert Nourgaliev <nourgaliev1@llnl.gov>

Merge branch 'barry/fix-options-default'

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

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

cleanup of use of PetscOptionsInt and friends including use of flag final argument

added graphics monitor of nonlinear residual during linear solve

Added KSPMonitorSNES() with command line option -snes_monitor_ksp to monitor SNES residual norm at each linear iteration