fixed PetscViewerASCIIPrintf() for a single viewer so that the singletons ASCII output is actually preserved

SNESFAS brackets around CHKERRQ(ierr) and call

SNESFAS: added tau-corrected grid continuation.

This just means exact upsweep solves.

Merge branch 'prbrune/snes-fasfull'

This branch adds several cycle types to FAS

Merge branch 'barry/saws'

SNESQN: only monitor real part of dot product (fails with C++ complex)

Merge branch 'master' into barry/saws

Conflicts:
src/ksp/pc/impls/gamg/gamg.c
src/sys/classes/viewer/impls/ams/ams.c
src/sys/objects/pinit.c

Added SNESView_QN, as it's now useful to sort out variants and options.

Added SNESQNSetType() and fixed the "default" options for scale and restart

Added better defaults to the individual SNESQN types

Bugfix in Broyden.

generalized the Powell condition to the jacobian scaling case.

Added the line-search based previous step in bad broyden

Generalized the Shanno scaling condition to all the variants

Fix "Bad" Broyden; all of them work now!

More cleanup of the new Broyden implementation

Better refs for QN methods

Make the Broyden update work correctly.

Options for FAS_FULL with respect to the initial downsweep.

Allow for smoother stagnations, but not divergences

SNES_DIVERGED_LINE_SEARCH should be an acceptable smoother exit state.

Fix for extra smoother sweep on finest level V-cycle in SNES_FAS_FULL

SNES_FAS_KASKADE for the sake of completeness

Added SNES_FAS_FULL, which does a multigrid F-cycle.

doc: remove UTF-8 '–' from sources as this breaks generation of html for sourcefiles

Fix Galerkin FAS memory leak.