Merge remote-tracking branch 'upstream/develop' into pkg-subversion

lib/spack/env/cc

lib/spack/spack/fetch_strategy.py

lib/spack/spack/test/cc.py

var/spack/repos/builtin/packages/astyle/package.py

var/spack/repos/builtin/packages/boost/package.py

var/spack/repos/builtin/packages/gcc/darwin/gcc-4.9.patch1

var/spack/repos/builtin/packages/gcc/darwin/gcc-4.9.patch2

var/spack/repos/builtin/packages/gcc/package.py

var/spack/repos/builtin/packages/gdal/package.py

var/spack/repos/builtin/packages/hypre/package.py

var/spack/repos/builtin/packages/kealib/package.py

var/spack/repos/builtin/packages/mumps/Makefile.inc

var/spack/repos/builtin/packages/mumps/package.py

var/spack/repos/builtin/packages/muparser/package.py

var/spack/repos/builtin/packages/openjpeg/package.py

var/spack/repos/builtin/packages/py-libxml2/package.py

var/spack/repos/builtin/packages/py-tuiview/package.py