* Add STAR-CCM+ package

* Cleanup commented out code

* November 1 seems to have brought a new texlive release, updating the
digest to match.

Also switching the url from their automagic mirror to an explicit
site to avoid inconsistencies during their updates.

It seems like only yesterday (#2073) that I updated this....

* Add comment to url warning about mirror updates

Add a comment to the download info warning to use a
specific site rather than the mirror, to avoid wobbles
during their asynchronous updates.

* Fix typo ('to no' -> 'do not')

Some packages which include resources fetched from source control
repositories terminated package installs because they failed to
archive; specifically, this included all SCM resources which identify
a specific state of the repo - for example a revision in svn or a
tag/revision in git. This is because the resource stage creation
logic did not choose an appropriate archive name for these kinds of
resources.

* Set OS-specific default compilers

* Fix flake8 warnings

* Use code from the `distro` package to improve linux distro detection.

Various issues [1] [2] with the platform.linux_distribution function led
to the function being deprecated in python 3.4. The pipi package distro
[3] contains compatible improved code that better tracks current methods
for identifying linux distributions (see, for example, [4],[5]).

[1]: https://bugs.python.org/issue20454
[2]: http://bugs.python.org/issue1322
[3]: https://pypi.python.org/pypi/distro
[4]: https://refspecs.linuxbase.org/LSB_3.0.0/LSB-PDA/LSB-PDA/lsbrelease.html
[5]: https://www.freedesktop.org/software/systemd/man/os-release.html

* fix (potential) unicode problems

* libSplash: Add 1.6.0 Release

Add the latest release of libSplash, version 1.6.0.

* Fix flake8 checks (another loop inversion issue)

* module files tutorial : first complete draft

- first complete draft for module files tutorial
- minor corrections to module file reference

* module file tutorial : first batch of corrections

- module avail spelled out fully
- typos from @adamjstewart
- rewording of a few sentences

* module file tutorial : first batch of corrections

- emphasized lines in yaml files

* module file tutorial : fixes according to @citibeth and @adamjstewart reviews

- used long format for command options
- reworded unclear sentence on tokes
- reworked table in reference manual to make it clearer

* module file tutorial : implemented corrections collected on site from @schlyfts

* module file tutorial : removed comment (@hartzell suggestion)

* updates to matio package

- update to a AutoTools package
- add variants for hdf5 and zlib
- add latest version

* fix flake8 error

* fix and simplify opencoarrays package using new CMakePackge methods

* add new version

* Add options for hashes, tree depth, and YAML to `spack spec`.

- Can now display hashes with `spack spec`, like `spack find`.
  - Removed the old "ids" argument to `spack spec` (which
    printed numerical values)b

- Can output YAML spec from `spack spec` with `-y`

- Can control depth of DAG traversal with --cover=[nodes|edges|paths]

- Can print install status (installed, missing, not installed) with -I

* Don't use YAML aliases in specs.

- Force Spack's YAML dumper to ignore aliases.
- aliases cause non-canonical YAML to be used in DAG hash, and result in
  redundant hashes.
- add a test to ensure this behavior stays

* fix to trilinos package

* fix to dealii package

* fix to everytrace package

* fix to everytrace-example package

* changes suggested by @davydden

* remove obsolete instructions on hacking clang+gfortran

* add detailed instructions on how to setup Clang+gfortran on macOS

* spack install: forward sys.stdin to child processes fixes #2140

 - [ ] redirection process is spawned in __enter__ instead of __init__
 - [ ] sys.stdin is forwarded to child processes

* log: wrapped __init__ definition

* In order to use TAU module, we have to set TAU_MAKEFILE env variable.

* updated with suggestions from @citibeth

* Fix style checker bug.

* spack flake8: print cwd-relative paths by default, with root-relative option.

1) list gfortran as a fc and f77 compiler that can work with clang
2) allow compatible gfortran to ./spack compiler find with clang by matching version numbers

This is based on the discussions in

https://github.com/LLNL/spack/issues/237
https://github.com/dealii/dealii/wiki/deal.II-in-Spack#mixing-gcc-and-clang-on-osx

This is not a long term solution but something to get us through the next months until the compiler
infrastructure is reworked to allow mixing and matching for C/C++ and Fortran compilers

Funded-by: IDEAS
Project: IDEAS/xSDK
Time: 1.5 hours

Without GRIB2 and HDF-EOS support yet.

* works to build newest version of nmap with gcc@5.3.0

* formatting

* clean up

- Detailed debug information is now handed back to the parent process
  from builds, for *any* type of exception.

- previously this only worked for Spack ProcessErrors, but now it works
  for any type of error raised in a child.

- Spack will print an error message and source code context for build
  errors by default.

- It will print a stack trace when using `spack -d`, even when the error
  occurred in the child process.

- Ported old run-flake8-tests qa script to `spack flake8` command.
- New command does not modify files in the source tree
- Copies files to a temp stage modifies them there, and runs tests.
- Updated docs and `run-flake8-tests` script to call `spack flake8`.

- generalized and fixed to work with any key in YAML file
- simplified schema writing, as well
- add more unit tests for the config system
- Rename test/yaml.py to test/spack_yaml.py
  - Add test/yaml.pyc to ignored pyc files.

- Added new preferences to config.yaml:
  - source_cache
  - misc_cache
  - verify_ssl
  - checksum
  - dirty

- Moved temp finding logic to spack.stage
- Updated stage tests
- Added tests for new path substaitution of $user, $spack, $tempdir

- Added a schema for config.yaml
- Moved install tree configuration to config.yaml
- Moved etc/spack/install.yaml to etc/spack/defaults/config.yaml
- renamed install_area to "store", to use a term in common with guix/nix.
  - in `config.yaml` file, it's called the `install_tree` to be more
    intuitive to users.
  - `install_tree` might've worked in the code, but `install_tree` is
    already a global function in the spack namespace, from
    llnl.util.filesystem.