Modified SNESLINESEARCHL2 to use the objective

Hg-commit: eb7ffe3d722ff48a2b777b229a4b720473fa5a7a

Modified SNESLineSearchBT to use the objective

Hg-commit: ca556ec1cc4d61951551e53ac131245a599c60bb

removed trailing blanks from source code
added rule rmtrailingblanks accessible via make ACTION=remtrailingblanks tree

Hg-commit: 6e3652165d48aa5f3e94dd66bf607adea6fac27a

Fix for BT Linesearch with tiny step; tries the full step and then quits at the last state if that doesn't work.

Hg-commit: 0dbf8303a83a8c60d659b4cd97dde3c539a863b3

removed || ynorm < stol*xnorm from bt linesearch since it can increase function value

Hg-commit: 23a9de6766be8390e674635d1bca2a636ae06e3b

merge from patches to 3.3

Hg-commit: e3ad00f17610d863526b7ae7e83d0cc0f6e3f134

Added missing SNES VI projection in BT Linesearch

Hg-commit: 056b2529146087ae6c34eb344009c1e5ad75cf72

added more castes to (double) for ASCII output in case of float128 precision

Hg-commit: 40ac9445e7c89bb4f8a477d0ca48e7d97117eed9

Fixed behavior of -snes_linesearch_norms to be that of old SNESLineSearchNoNorms

Hg-commit: 75ce2e72042942d6fe1a12239c618d155aa34e20

ynorm < snes->stol*xnorm as a reason to use the full step in SNESLineSearchBT

Hg-commit: 46b2e580ddbb0b2007b3cfbead8623d93a403444

Set default number of linesearch iterations right for the l2 and cp solvers (after bt has been initialized it sets it too high)

Hg-commit: 6719d4db39e2cda755f32230ae83cf5dd3c733a7

Fixed -snes_linesearch_minlambda behavior when Y and X are badly scaled.

Hg-commit: f6ec83fbab1d713bb9ab407221b8f33c63e24fca

Fixed trivial output differences and some formatting of linesearch view.

Hg-commit: c9a65950faa4a55d5cbd6dab41db2fc7d2f04780

Updated the SNESLineSearchPre/PostCheck calling sequence to make it easier to use in SNES implementations. This should not impact user code.

Hg-commit: b1dceefb03e9fd8d2aa44840835add820c2048b8

PetscTypeCompare -> PetscObjectTypeCompare

Hg-commit: 3fc8f665421ddb862bf4d1ba95505378246340be