PetscHeaderCreate: Shorten argument list and optimize memory allocation

* Remove type arguments from the macro
* Use a single memory allocation call instead of three

Options: Add PetscOptionsGetEnumArray() and PetscOptionsEnumArray()

string was freed before it was used in an error message

fixed missing CHKERRQ() detected by clang's --analyze

updated PETSc directory layout to match standard packaging strategies

include/petsc finclude,private,mpiuni
lib/petsc conf
bin/petsc*

Fix compiler warnings about unreachable code

Merge branch 'barry/fix-petsc-objects-log'

Options check for PetscObjectLog was not protected inside PETSC_USE_LOG

Only keep list of current objects when flag PetscObjectsLog is set
which currently can be set via -objects_dump

Fix compilation for scalar-type=complex in C++ (after addition of PetscOptionsScalarArray)

add PetscOptionsScalarArray() as requested by Jose E. Roman

Merge branch 'maint'

Fix manual page that Fortran requires PETSC_NULL_CHARACTER not NULL_CHARACTER

Reported-by: Shao-Ching Huang <huangsc@gmail.com>

Merge branch 'master' of bitbucket.org:petsc/petsc

--with-threadsafety no longer requires --with-debugging=0

PetscFPTCreate() was not called in petscinitialize_()

Don't print SAWs URL since it disturbs all the test output

Merge branch 'barry/saws-options-merge-master'

shift order of processing options for TS to be compatiable with SAWs
Fix options handling for SAWs to duplicate array that previously was deleted too soon for SAWs processing

remove some dead code for AD and old AMS java and Matlab utilities

add missing PetscFunctionBegin; that messed up displaying of stack

moved saws directory to proper share directory location updated source to point to it.

PetscOptionsObject->prefix was freed before using in SAWs post processing
hence SAWs was unable to change any type which had a prefix

display URL to point to to access SAWs server

missing break in case for handling string arguments
better description for Options database option handling