Pulled in changes from petsc-dev. make tests passing. Everything looks good.

Hg-commit: 94eb5d50210da3db6d654576e30f2a31ec2adf25

Reorder OpenMP flags

Hg-commit: ff8ce04dccfcbafdfb9bf03156a00ccf99a8157f

update superlu_dist to latest tarball.

Hg-commit: 63062a5d8e0491c0f46a43468e6970431e8afb24

split ctetgen to http://petsc.cs.iit.edu/petsc/externalpackages/ctetgen
and add --download-ctetgen

Hg-commit: 646083840502da4789a813c26041e76ee7f696b7

OpenMP does not require Fortran

Hg-commit: 40c24c8a0edca228bbaff3b9f3c79c12dad3712f

remove 'longdouble' from help/error messages

Hg-commit: 4928fe59794bbf454ef4cef02ada6b06217b4b4e

updated and merged from petsc-dev

Hg-commit: 4bdbb24181fe1c8ce13e9b82c1d499b152c3d14f

Added _GNU_SOURCE in PETSC_DESIRE_FEATURE_TEST_MACROS and config/PETSc/Configure.py

Hg-commit: d27da1b0d8eb506dd840912d105861abaf00ad44

Lots of changes. Also addign new files for cusparse matrix type.

Hg-commit: d2f118b395b24fdc836f857e3f221f6c0c9eca58

'make distclean' requires config/Makefile.config to exist - and than
it deletes this file in the clean process. So a hypre-rebuild after a
broken hypre-build will give errors. Fix by always making su

'make distclean' requires config/Makefile.config to exist - and than
it deletes this file in the clean process. So a hypre-rebuild after a
broken hypre-build will give errors. Fix by always making sure the
file exists before distclean is invoked.

Hg-commit: f46421c5fe260a1fe4c53b04a18a98a9df961a1b

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fix url typo

Hg-commit: fe6059b08aeff484c6b2005698f56e204cea8926

#115638 host fftw tarballs on our server

Hg-commit: b5ae22b115f9508d30bd4ee47ec4b726a6f5be9e

Update FFTW to 3.3.2

Hg-commit: 401a83b8cd120d26c1c2fc1e57fee0f5f7f35ab4

Allow building PETSc without C++ even when a package interface requires it

Hg-commit: b06018e1d4461c3e40ace7f1f8e3e455bdabd991

Elemental requires C++ until the build system supports building select files with C++

Hg-commit: 3a4b8e3019b4f2431a9226426158158e58155251

Merge elemental interface

Hg-commit: 95622fee58f900d58296ebdb712fa0d12482bae5

Add basic Elemental interface

## Implemented
* MatMult and MatMultAdd
* MatSetValues for locally owner parts (no stash at this point)
* Use MatGetOwnershipIS() to determine which entries a process s

Add basic Elemental interface

## Implemented
* MatMult and MatMultAdd
* MatSetValues for locally owner parts (no stash at this point)
* Use MatGetOwnershipIS() to determine which entries a process should be responsible for assembling
* Viewing is currently in Elemental ordering, can use MatComputeExplicitOperator() for debugging

## Short-term priorities
* Grid needs to be shared between multiple Mats on the same communicator, implement by attribute caching on the MPI_Comm
* Stash for assembly of unowned entries, can cache locally and use Elemental's (collective) "axpy" interface
* MatMat operations, factorization, etc

Hg-commit: 9d1af7db82c9477605dc39b514d53db5a9855fc7

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Elemental installation with specified MPI compilers.

Hg-commit: bdc349f0c8ee4fd5f5fb39cf75da097cb583f99b

Elemental update.

Hg-commit: 8c3175719e0dbebda8ae79a2ca55ba1acc5230a0

elemental requires Cxx suppport

Hg-commit: b37f61df9137b5fd147defd1d90df1201a6823bd

dd elemental.py written by Xuan Zhou

Hg-commit: 3b21d4d13d3bf797519362091cadc177fb28f690

merge release-3.3

Hg-commit: 5fedf93c78c2bdcaabc4b8ee7380a68199d19b3c

Correct macro _POSIX_C_SOURCE 200112L test for MacOS.

Hg-commit: d4742b427e020f84e29ac562535c15abfedf565a

got openmp threadcomm to build shared library on apple

Hg-commit: d994d152eebc0d18819ba525d7354d58f617fcb1

fix ptscotch configure check to match d8b49725f826

Hg-commit: 44f006c4951dcf3386f229614576eac9ed1f41be