* xios: XML-IO-SERVER library for IO management of climate models
* xios: install to prefix directory
* xios: add a test case
* xios: define versions to use cache and mirror directories
* xios: use proper svn URL for version 910
* xios: package url must be defined, otherwise uninstall fails
* xios: add trunk version to allow building latest revision
* xios: enable parallel build
* xios: allow installation with mpif90 compiler wrappers
* xios: use mpi variants of dependencies
* xios: allow user to specify MPI launcher via MPIRUN environment variable
* xios: prefer spack versions of blitz and boost (needed for gcc@7)
* xios: enable builds with clang+gfortran on OSX
* xios: use numeric versions for releases, @develop for trunk
* xios: different patches required for @1.0 and @develop
* xios: patch function for clang works across revisions
* xios: link blitz library
* xios: workaround bug 17782 in llvm
* xios: whitespace adjustments for flake8
* xios: avoid bare except clause
* xios: netcdf-fortran inherits ^netcdf+mpi from xios dependencies
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