- Fixed in package.py
- Fixed wrong prototypes in packages that use it.
- Fixed build_environment to set module variables properly
- added hacky fix to ensure spec/package consistency in build processes.
- Need to think about defensive spec copy done by `Repo.get`. May be
time to think about an immutable spec implementation.
- Gave setup_environment and setup_dependent_environment more similar
signatures. They now allows editing the Spack env and the runtime
env for *this* package and dependents, respectively.
- modify_module renamed to setup_dependent_python_module for symmetry
with setup_dependent_environment and to avoid confusion with
environment modules.
- removed need for patching Package objects at runtime.
- adjust packages to reflect these changes.
