bunch of fixes in plex tests and code for single precision

Reported-by: nightly tests

Merge branch 'scott/testharness-update1'

Merge branch 'balay/add-prefix-test'

f90impl.h needs to be available for users with --prefix installation

Reported-by: Satish Balay <balay@mcs.anl.gov>

Minor cleanup, remove some outdated code, remove unneeded constructs, improve manual pages slightly, add missing test case

Time: 2.5 hours

Remove the use and definition of __FUNCT__ throughout the code

Since all modern C/C++ compilers provide this functionality we no longer need to provide it manually in PETSc
Time: 1.5 hours
Thanks-t

Remove the use and definition of __FUNCT__ throughout the code

Since all modern C/C++ compilers provide this functionality we no longer need to provide it manually in PETSc
Time: 1.5 hours
Thanks-to: Andreas Mang <andreas@ices.utexas.edu>

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Merge remote-tracking branch 'origin/pr605/mapdes/runtime-noviewfromoptions/master'

Merge branch 'pr605/mapdes/runtime-noviewfromoptions/master'

Fix strange not 2 being passed to >&1 in makefile tests

Remove the needed def extension from Fortran include files

Time: .3 hours
Thanks-to: Satish Balay <balay@mcs.anl.gov>

Revert "Add log event for PetscOptionsGetViewer"

This reverts commit 8540dad3b2fdd8ef545edc3be868c162ab2475da.

| PetscViewerInitializePackage() gets called in PetscViewerCreate()
| [similar to KSPI

Revert "Add log event for PetscOptionsGetViewer"

This reverts commit 8540dad3b2fdd8ef545edc3be868c162ab2475da.

| PetscViewerInitializePackage() gets called in PetscViewerCreate()
| [similar to KSPInitializePackage() getting called in KSPCreate().

| However - with viewers - there is no ViewerObject created before call
| to PetscOptionsGetViewer(). Also PetscOptionsCheckInitial_Private()
| calls PetscOptionsGetViewer() before loging is initialized. So we
| can't really have an event/loging for PetscOptionsGetViewer().

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Add log event for PetscOptionsGetViewer

Normally this time should be small, but this way we will see if there
are many calls that are hurting.

Add test of PetscViewerPushGetViewerOff

Allow runtime control of viewer creation in PetscOptionsGetViewer

27b0f28 (Added configure option --with-viewfromoptions=0) allows
building PETSc such that PetscOptionsGetViewer never returns a view

Allow runtime control of viewer creation in PetscOptionsGetViewer

27b0f28 (Added configure option --with-viewfromoptions=0) allows
building PETSc such that PetscOptionsGetViewer never returns a viewer.
Sometimes it is useful to control this at runtime. For example, we
would like to still use -log_view and the like, but want to turn off the
expensive XXXViewFromOptions and similar calls inside small subsolves.
Allow this by exposing control at runtime. Typical use case:

PetscOptionsPushGetViewerOff(PETSC_TRUE);
for (i = 0; i < npatch; i++)
KSPSolve(patch[i], ...);
PetscOptionsPopGetViewerOff();

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Updated and simplified Fortran interface

Reduced from 4 distinct approaches to using PETSc from Fortran to 1
No more .h90 files (Fortran 90 functionality is now always available)
Parameters and func

Updated and simplified Fortran interface

Reduced from 4 distinct approaches to using PETSc from Fortran to 1
No more .h90 files (Fortran 90 functionality is now always available)
Parameters and function prototypes are now provide through Fortran modules, not includes;
only #define are provided in the petscXXXdef.h files
PETSc objects can be declared as either type(tXXX) or XXX. For example type(tVec) or Vec
Moved now private Fortran include files out of public include directory since uses don't use them;
they are only used to generate the Fortran modules
Easier to support and test; we can now easily add more function prototypes
Also had to rework generation of manual pages to consistently use MANSEC and SUBMANSEC
since these variables also handle how the Fortran modules are generated.

Time: 57 hours

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Merge remote-tracking branch 'origin/balay/fix-matlab-test'

matlab: fix runex12 in src/dm/examples/tests

Thanks-to: Barry Smith <bsmith@mcs.anl.gov>