Initial implementation of additive FAS

Hg-commit: 3c91376eeeb13690b83f33cb5923e86f0a5750a9

started to add FAS types; modularized the FAS cycle for easier composability/additive implementation

Hg-commit: 4e72cb35ff5a4dc112db0b108cae04b601072962

Fixed makefile

Hg-commit: 12135361b40970ae3cb4f2d3a120e9a631af87c7

Fixed (?) rhs handling in fasgalerkin

Hg-commit: 9b710d319f34ff4588818c06c4e18a2020a2c0ec

qn monitoring fix for complex

Hg-commit: fecf24e77e6402afd8bb84dda101f67cbcf8d55d

added method-specific monitor to QN, fixed fasgalerkin

Hg-commit: 0c33880acc0096c370d36235d046591d69e2ded8

Initial addition of galerkin FAS method

Hg-commit: 2f99abc9f071878ad7b8dd1c106b0ef9748e36dd

Fixed convergence reason for ncg, updated output for change in max_it behavior

Hg-commit: e8a902679646b998a23389d48368f431e02f9812

fixed max_its in ncg and ngmres

Hg-commit: ec7b715a9699832e71e5efa51aa4acef0318cfd7

usegs selection for NCG and NRICHARDSON; fixed test output and readded GS example

Hg-commit: 604ca8171dd0ec6c63045930eeae4edde2279e5c

Added SNESSetUseGS() to provide choice between preconditioner or provided GS for all composable solvers

Hg-commit: 4548a4ad4302bbc6f1115e9cb84fa303ab7ded01

fixed use of nonlinear GS for ngmres

Hg-commit: 9960cb77f0669776a5454428110f23b7572f3b75

FAS monitoring fixes

Hg-commit: 0b04e6c84c1a75eb7cc8fef578d824d678193e82

made FAS use per-level SNESes for monitoring; now fails gracefully.

Hg-commit: 9744efde77db4634341d2a6571011680048ffd91

FAS sets up smoothers' computefunction/jacobian/gs more consistently and clearly now.

Hg-commit: 404e44e2f495943bacfb5c852ca0fcbcc021659d

moved petscsnes definitions back to petscsnesfas.h

Hg-commit: 2c89c95c21bd34e5cca17fa7699a5673f9fd8506

Renamed DMGetInterpolation(), DMGetInjection(), and DMGetColoring() to DMCreateInterpolation(), etc for semantic consistency

Hg-commit: a45bcab2b329db85bdff728f3e039f094e2e00b9

Fixed Fortran stub problems

Hg-commit: 0857b5000e81e342f8bb4a18ee4dfc13eded5ca9

This FINALLY compiles. Barry, fix this crap up. I have mutilated it.

Hg-commit: 61f972c62bd8b600acaaac760833e1e62f100178

more small doc fixes for FAS

Hg-commit: 68179464462c8e06178d291e610810e9191daa24

doc and interface fixes for FAS and GS

Hg-commit: 92df16ff4c9d6f09b21386898b45c8538f886b88

Added options to pick Nonlinear Gauss-Seidel vs. internal SNES solver smoothers in FAS and composed ex50 example

Hg-commit: 8cef21524ee997338b9edceb36d6aa9a2f0cfc51

bugfixes to GS use with FAS

Hg-commit: 434a0e5f5ad85b31702bc36376dfe52bf38144b7

C/complex fixes for FAS

Hg-commit: 89176fa9e89cc63770d29edb8474ac7326e0d63b

allow ngmres to use the computeGS machinery and update test output

Hg-commit: cf65b5fccec1441837943c3b4242b5dbdc8ffcf4