=========================
5 new packages since 0.8.15:
---------------------------------
- cram
- metis
- otf
- ravel
- scotch
- Fix for SAMRAI fetch URL.
For packagers
---------------------
- MPICH now sets up MPICH_CC, MPICH_CXX, etc. in dependent environment
so that dependency builds use Spack compiler wrappers.
- Simpler build error messages on fail (no more python stacktrace)
- Disable CMake policy warnings in `std_cmake_args`.
- Remove superfluous compiler wrapper links (g++ link interfered with icpc)
- Several new packaging helper functions:
- `install_tree`
- `traverse_tree`
- `force_symlink`