tgamma: icc on windows requires mathimf.h for tgamma.
[but configure doesn't use any includes in tgamma test]
Escape quotes in paths in petscmachineinfo.h
Mat Chaco: remove another case of PETSC_DEFAULT out of range of enum

The old code generates a compiler warning with clang-3.3, but passing
the out-of-range argument is likely a warning with other compilers.
mpicc: disable 'wrapper override check' when user provides --with-mpi-compilers=0
exodus: do 'make clean' between repeat builds
exodus: cleanup build process [make.inc is unused & fix postInstall() to use the correct file]
sundials: disable f77 properly
download: update text that suggests git download for release
plog: Fixed Fortran binding for PetscLogPrintDetailed()
Merge branch 'irving/fix-quotes-in-petscmachineinfo.h' into maint
Merge branch 'balay/fix-exodus-clean' into maint
Merge branch 'balay/fix-mpicc-override-check' into maint
Merge branch 'balay/fix-sundials-nof77' into maint
Merge branch 'balay/fix-tgamma-windows-icc' into maint
Increase patchlevel to 3.4.2
Merge branch 'jed/fix-chaco-default' into maint

Fixes warning with clang-3.3.

* jed/fix-chaco-default:
  Mat Chaco: remove another case of PETSC_DEFAULT out of range of enum

Conflicts:
	src/mat/partition/impls/chaco/chaco.c