Merge branch 'develop' of https://github.com/LLNL/spack into features/custom_modulefile_from_config

lib/spack/env/cc

lib/spack/spack/cmd/module.py

lib/spack/spack/modules.py

lib/spack/spack/test/mock_database.py

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

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

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

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

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

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

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

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

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

var/spack/repos/builtin/packages/mvapich2/package.py

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

var/spack/repos/builtin/packages/netlib-lapack/package.py

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

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

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

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