Modifications:
* Added zlib dependency, starting from version 3.0.0
* Added memchecker support for debugging
* Remove mpirun and similar links if slurm is selected as a scheduler
* [hypre] Add the 'headers' property plus a small tweak in the 'libs'
property.
* [hypre] Add fallbacks for searching for '.libs' in 'prefix.lib64' and
in all of 'prefix'.
* [hypre] Fix style.
* [hypre] Use find_headers instead of find + HeaderList.
* added a new package file for PHIST (Pipelined, Hybrid-parallel Iterative Solver Toolkit)
* packages/phist: fix some formatting errors (too long lines etc)
and set allowed values for option "outlev"
* packages/phist: fix some more flake8 errors
* add headers property to netlib-lapack and intel-mkl
* ghost: fix finding cblas header and libs (at least for mkl and netlib-lapack, which provide headers())
* added a new package file for PHIST (Pipelined, Hybrid-parallel Iterative Solver Toolkit)
* packages/phist: fix some formatting errors (too long lines etc)
and set allowed values for option "outlev"
* packages/phist: fix some more flake8 errors
* phist: use headers property to find lapacke include dir
* phist: fix flake8 error
* phist: be more specific about dependencies and update version
* phist: state trilinos minimum version when building with Tpetra kernels
* gmp: add oldish version 5.1.3 with checksum
* phist: get rid of the 'petsc+complex' variant, it can be installed by kernel_lib=petsc ^petsc+complex
* phist: new version
* phist: fix version checksum
* Revert "add headers property to netlib-lapack and intel-mkl"
This reverts commit d8cb62905ebfb2cba186fd2d736d54a88a49d089.
* Revert "ghost: fix finding cblas header and libs (at least for mkl and netlib-lapack, which provide headers())"
This reverts commit d406a77ed7879c124fbaf1d757d002b9f0771620.
* phist: remove unused function
* phist: reorder package file versions/variants/depends_on/rest
* phist: some minor changes requested by @adamjsteward
* Add latest version of MPFR and patches for older versions
* Fetch and checksum patches instead of storing them
* Fix bug, version attribute was being overridden
* meme: added perl-xml-parser dependency, resolved issue. still need to fix ghostscript or image-magick, conversion not working.
* meme: fixed issue with libxslt/libxml2 conflict, and added imagemagick support
* meme: removing libxslt/libxml2 dependency lines
* meme: configure args
* meme: separating configure args
* meme: removing a comment, and hoping for travis to rebuild. site seems back up.
* meme: make image-magick optional
* meme: add comment referencing PR
* meme: bah flake8
* Promote to Autotools for simplicity; broaden Intel CPU opt targeting from SSE4.2 to AVX2
* make Intel CPU opt targeting same as in ../libxc
* flake8 W291
* use canonical means to pass (ahem) the test phase, h/t @adamjstewart
* revert f25d598 (unrelated merge)
* re-merge
