aoptions.c fixes for single precision in sscanf use

Hg-commit: 36ca14d83aab9f38d9a16c48e990e75914a577aa

changed handling of __SDIR__ to make a string inside of petscerror.h instead of in the shell
fixed Options database code for C++

Hg-commit: c6eceed7748cd722537376487a2ee1ff262eb623

added support for GUI interface for PetscOptionsList()

Hg-commit: 87eec443dcebecef24166f250c0681dec26290ce

handle PetscOptions GUI for int and real array, fixed so PetscOptionsGetFromTextInput() prints over PETSC_COMM_WORLD

Hg-commit: 8134b8400823ac5e5073a2e9b17d9533d318391d

cleanup of options code

Hg-commit: 0c1607112f16f17152f4bd57ffee5ee65286e133

removed PetscOptionsHelp objects and code since they were not used

Hg-commit: 853bd784d1b50153cefae5ac7e5aa855631e5b09

support for GUI for PetscOptionsReal()
explain PetscOptionsObject.changedmethod

Hg-commit: 1ec5be9e77d352cedeb69f713e53ac1d9b7b1c34

tiny update to -options_gui forgot to get in last commit because of stupid murky design that does not display changed files first

Hg-commit: 334035f55511a213a6a217f67735ca403b8da0cd

very crude -options_gui that uses stdin is now working

Hg-commit: 5db3b2f044a20feeee821437c9e33c1d25fee236

minor cleanup to handle single precision complex
updated comments in petscblaslapack_*.h files to remove outdated information from cut and paste

Hg-commit: 4a92e669502fdabccef0967283527271701c1a71

added support for using single precision with complex numbers and C++.

Hg-commit: 9df3f420bae8813806da92c4f1fe2c29018e386c

changed sending of function pointer messages in PetscOpenMP commands to use MPIU_SIZE_T object, not integer.

Hg-commit: eff130d7c311bfb14ff1ab9b693b67de4de6f860

commit after merge

Hg-commit: 537b7ad5a7485d8b85edc0113e622cebdfc7b269

improvements to PetscOpenMPMerge() to allow it to be run inside the program and an example of its use
updates to lsqr.c with preconditioning to more stable form

Hg-commit: 2d51898f92e225dc9c39f6963f

improvements to PetscOpenMPMerge() to allow it to be run inside the program and an example of its use
updates to lsqr.c with preconditioning to more stable form

Hg-commit: 2d51898f92e225dc9c39f6963fd52521b394fa6f

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spell "of" with an "f"

Hg-commit: 88a36a94c7c8fbfb94eeafaafe4acf4034922fbd

Take two using PetscOptionsGetTruth in PetscOptionsTruthGroup

Hg-commit: cc88a75d9eafebea42b7a414771d18a89cf19195

use -lpetsc for single-library=1 and -lpetscsys for single-library=0

Hg-commit: a8480cd095925bfa279aced5ffe2f4a4f100ebbd

Backed out changeset 54936a75dfe8

Oops, this broke everything. I'll track down the reason.

Hg-commit: ae0d7b56898cc82bb92bd00c5a58127b8e2918f4

PetscOptionsTruthGroup: use PetscOptionsGetTruth instead of PetscOptionsHasName

This allows deactivating members of a truth group with -long_option_name 0
instead of having to delete the whole optio

PetscOptionsTruthGroup: use PetscOptionsGetTruth instead of PetscOptionsHasName

This allows deactivating members of a truth group with -long_option_name 0
instead of having to delete the whole option name to deactivate.

Hg-commit: 54936a75dfe8d884297d4b92bb55dbb841ea4b17

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changed PetscSum_Op to MPIU_SUM to match the style we have for extra MPI stuff

Hg-commit: 6f826cf21d32c05c8a481b7d8be71073e672cf40

added support to us MPI_C_DOUBLE_COMPLEX if it exists.

Hg-commit: c1dd1aecbb58a31cdf6a75e069e3e092253f12cb

remove extern_c_end that didn't seem to belong

Hg-commit: 5622b9a1a333393e0ead0546ac4fb95d0e620fbe

added support for any dimension for MAIJ matrices so DAGetInterpolation() will now support any size; not tested but simple code

Hg-commit: 587be0149b038e8aae3fb6f6edeb4cfd9a7b7aa2

correcting of 0 assignments to double to be 0.

Hg-commit: 4e8d3c66ce68ac50361b8dc9292a6438842e1543

merge from release

Hg-commit: 6cd160a837ad5cab8f32567eb4e7ef3a381a47f5