Todd Gamblin 26480f14f9 Add "default" configuration scope. ... - Default scope is versioned with spack and can be overridden by site or user config. - Default scope provides sensible default concretization preferences for all of Spack. - per-platform concretization scope can be added later (to force a particular MPI on, e.g., Cray systems)		2016-07-19 17:10:17 -07:00
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spack/defaults	Add "default" configuration scope.	2016-07-19 17:10:17 -07:00