Pushed the PetscLineSearch interface forward into SNES proper

Hg-commit: 73c501757b30415edb078f4e9483eaa17edd8d12

Namespaced the LineSearch into PetscLineSearch

Hg-commit: 26f9518a3e47a8fbf342a60b124de65d104c86c8

commit after merge

Hg-commit: 4f48dde03429d0318c7e23bc7de128a9e6ddc8fd

Small additive FAS fix

Hg-commit: 5791a4ceb4dfca8029d32a19a390ec03d42b5160

FAS LineSearch update

Hg-commit: 8ba85f819fb604bc5719c1ea935ecdaae6537e25

Refactor SNES DM infrastructure

The residual and Jacobian function pointers are now stored in a managed
context on the DM. Coarsening of this context is handled by a
DMCoarsenHook, so the coarse lev

Refactor SNES DM infrastructure

The residual and Jacobian function pointers are now stored in a managed
context on the DM. Coarsening of this context is handled by a
DMCoarsenHook, so the coarse level DM automatically has function
pointers for residual evaluation. The SNESDM context (attached to a DM)
has copy-on-write semantics for all DMs other than the one it was
originally created on. That means that changes to the function pointers
from the fine level are automatically propagated unless a coarse level
is changed manually.

Hg-commit: ce0066853e1ef4402603a33070cb3bfd75c87f86

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commit after merge

Hg-commit: e8d19a834d936a4816c3abf3af0b68733c00be11

commit after merge

Hg-commit: ad9064ecab6663bf6a24da505dd949d26e524f4c

NCG preconditioning fix, FAS options fix

Hg-commit: 80373b530f4989bfa9f0214836e94c52faec80c0

commit after merge

Hg-commit: 0db928480d979c13a2377936075c7720438182bd

merge

Hg-commit: 6139c3de79f9d74a80e024c910f044204214f925

Remove SNESRestrictHookAdd() and associated unaintainable design, move to DM

The coarsening hook is called when a coarse level is first constructed.
DMRestrict() is used to update auxiliary informat

Remove SNESRestrictHookAdd() and associated unaintainable design, move to DM

The coarsening hook is called when a coarse level is first constructed.
DMRestrict() is used to update auxiliary information on coarse grids.

Hg-commit: 121984cbeafd368f2685a0e7485337133d3b8922

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added SNESLineSearchApply(), SNESLineSearchPreCheckApply() and SNESLineSearchPostCheckApply() to the interface

Hg-commit: 2c13a8e4d8b8ac5f9278109127dbdacc4d0d6da6

commit after merge

Hg-commit: 7c3c3f8c0d65b793aea33c138419de755b591ca7

Add support for SNES restrict hooks

Hg-commit: ff3d7858dc3b26c3b71aefedea52eed94d9a80c7

Add SNESFASRestrict() to abstract restricting using injection.

I screwed up earlier commit where this function was first used, but too much work to fix with Hg.

Hg-commit: 16a2bd033711f6abe8e78a19a

Add SNESFASRestrict() to abstract restricting using injection.

I screwed up earlier commit where this function was first used, but too much work to fix with Hg.

Hg-commit: 16a2bd033711f6abe8e78a19a4d576d0f7687257

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Add SNESFASCreateCoarseVec() for clarity and because rscale need not exist if injection is used

Hg-commit: 73a07f66fd1742bba4173d7ca11a136fdf510fe4

Clean up dynamic function registered by FAS

Hg-commit: 5cfd139935dd7272a283645b00bb6168c80f65e9

Close memory leaks if user calls SNESFASSetRestriction() and friends more than once (or after they were first created from DM)

Hg-commit: aa47a99ab00ea5f8bba956369f7a1a9ee23af78d

SNESFAS comments, error reporting fixes

Hg-commit: 70e9259777382fdb904549785a91cab9518a174a

set snes->max_its and snes->max_funcs to be appropriate values for new SNES solvers

Hg-commit: 178cccead9cd0386074217651ed25b5a410dcd41

made NGMRES and FAS save function evaluations when preconditioned; added -snes_gs_norms; output fixes

Hg-commit: f7cef9644b64612473282b091d00a90d10304349

Fix reference counting for FAS

Hg-commit: ed3812babaf45f37e4ebfcfa170db0862039635a

Merge

Hg-commit: da7192eda3c2721456f07edf54ad1d0c14243f79

merge

Hg-commit: 450a80d0aee31915d8a394fdb853ecda0198e343