- Added a 'url_for_version' function to the METIS/ParMETIS packages.
- Added installation support for METIS@5.0.2 and ParMETIS@4.0.2.
- Changed the 'double' variant to 'real64' to make it more consistent
  with the 'idx64' variant naming.
- Removed an unnecessary dependency on gdb.

- `spack spec dealii` now takse seconds rather than 18 minutes.

- Slow hash (`dag_hash`) was accidentally inserted into the fast hash
  (`__hash__`).

- Do not put the slow hash in the fast hash.

tbb: add 4.4.4; raise InstallError when building 4.4.3 with GCC6.1

Adding `+metis` variant to scotch + changes for esmumps

changes to simplify the esmumps variant for version < 6.0.0 + typos corrections, according to the remarks on PR #979

initial docs for find and flake8 cleanup

Add option to disable VT support in openmpi package

Add boost 1.61.0

astyle: fix filter command which failed on OSX with python 2.7.10

Fix : spack find

Enhancement Proposal: Exempt '@when' Functions from Style Redefinition Errors

Conflicts:
	lib/spack/spack/cmd/find.py
	var/spack/repos/builtin/packages/ghostscript/package.py

- Tagging a version to include all that's happened since 0.8.17

- This is in anticipation of merging `features/cflags` and
  `features/newarch`, which will break the spec format.

- 1.0 will likely come after those.

track whether a package was installed "explicitly"

complete lua rework

Remove duplicate providers that can concretize to the same result

Patch generously provided by @becker33.

Closes #928.

sed: add package

Golang new