Todd Gamblin c6351b5d00 Fix #11: bug in ProviderIndex ... - packages that provided same spec (e.g. mpe) were overwritten in the index - Index now has a set of providers instead of a single provider per provided spec. - see https://github.com/scalability-llnl/spack/issues/11		2015-01-14 00:18:29 -08:00
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spack	Fix #11: bug in ProviderIndex	2015-01-14 00:18:29 -08:00