* Add python cdo support

* Correct pypi url

* Corrected a blanck space that was failing CI

* Corrected url that was failing CI

* Following @alalazo indications, Write this line wrapping it around 80 chars to pass Travis

* Added cdo package depency

Fixes issue #2578

A couple of updates for python package.

* Better cxx11/14 flags for GNU/Clang/Intel

- GCC 4.8 only supports -std=c++1y for C++14
- Use CMake's rules for AppleClang to set cxx11 and cxx14 flags based on
  Apple Xcode/LLVM version
- Use CMake's rules for Intel to add support for cxx14 flags based on
  Intel version.

* Add cxx17_flag property

Implement property in compiler for c++17 as per those for c++11/14.
Add concrete support for GNU/Clang:

- Return -std=c++1z for GCC 5 and above per GCC documentation
- Return -std=c++1z for Clang 3.5 and above per Clang documentation
- Return -std=c++1z for Apple LLVM 6.1 and above per CMake's rules

* Added support for xSDKTrilinos package

* Updated xsdktrilinos/package.py for PR review

* Added trilinos version # reqs to xsdktrilinos

* xsdktrilinos now uses CMakePackage

* Cleaned up xsdktrilinos/package.py

* Removed unused cxxflags from xsdktrilinos

* Removed unused sys import from xsdktrilinos

* Update `spack setup` and `spack graph` to be consistent with c557e765 and 9347f869.  Fixes #2316.

* Added another "fix" necessary to make `spack setup` work.

* Added another "fix" necessary to make `spack setup` work. (reverted from commit 7f0d3ecb38c97ec00491d7cd66b4266e3018b1ca)

* Add freetype dependency on bzip2

* Switch package with an install method for the docs

* Add documentation for repositories and namespaces.

* Update and extend repository documentation per review.

- Also add `-N` argument for `spack spec`

* atlas: fix lapack stage path

* atlas: add a few links to other package managers

The advanced [Uninstalling Packages](spack.readthedocs.io/en/latest/tutorial_sc16_spack_basics.html#uninstalling-packages) via hash has a couple missing `.. code-block:: console` directives ;)

I have no idea what branch to direct this to though...

* likwid: add todo

* liwkid: add a note on hwloc dependency

Rename developer version, add new version, and make patch version
specific.

* clang: do xcode mockup iff requested by a package

* add a note

* add pkg to setup_custom_environment() and decide whether or not to use mockup XCode there based on the package

Main page states [3.3.1 is latest stable](http://eigen.tuxfamily.org/index.php?title=Main_Page).

Source project page states [6.0.4 is latest stable](http://scotch.gforge.inria.fr/)

Supports installing both a "known version" of PETSc/PFlotran that works and
the develop/master branches of both packages

Funded-by: IDEAS
Project: IDEAS/xSDK
Time: 4 hour

* update flux dependencies and package

* refinements from @adamjstewart

* fix flux document generation

The docbook-xsl package has been added, and correctly configures catalog
files to generate documentation correctly with asciidoc.

* astyle: do not set user/group when installing on macOS

* astyle: add new version

otherwise petsc may pickup libX11 on login nodes during config/build,
but libX11 may not be available on computation nodes.

* Make targets an attribute of compilers, similar to OS. Allows users to use `spack compiler find` to add compilers for the same platform/os but different targets when spack is installed on a file system mounted on machines with different targets.

* Changed get_compilers() method to treat old compilers with no target as target='any'

* flake8 changes

* Address change requests for comments/code clarity

* Added package 'uuid'.

* Added package 'cmor'.

* Updated 'cmor' and 'uuid': docstring formatting.

* Add support for parsing R-XML URL versions.

* Better url-parse debug output.

- just print the debug stuff all the time.

* fix R-XML versions.

* Update emacs: current release, use our x11 bits

Add checksum for 25.1 release.

Rework the X support:

- use Spack's X11 bits
- add ability to specify an X toolkit (gtk or athena, default is gtk).
- change toolkit names to align with Emacs' configure usage.

* PEP8 cleanups.

* glib dependency should not be type=build

I'd like to blame that on a typo, but it's a few too many characters
for that to be viable.  I'm not sure what I was thinking.

* Pass X variant down: emacs->pango->cairo

* X variants default to False, warn on bad toolkit

Change the X variants for emacs, pango and cairo to default to False.

Check that the toolkit is a valid choice and give a reasonable error if
not.

* Fix flake8 issue, reword warning text

* gtkplus needs to use +X variant for pango to work

In order for a useful variant of pango to be built into the spec I
needed to make the dependency on gtkplus explicitly specify it's X
variant.  The X variant is the default, but that wasn't enough to make
it happy.  Since it's happiness is the most imporant thing in the
world, this change! :)