Todd Gamblin 52d140c337 Factor out URL fetching into URLFetchStrategy ... - Added FetchStrategy class to Spack - Isolated pieces that need to be separate from Stage for git/svn/http - Added URLFetchStrategy for curl-based fetching.		2014-10-03 16:53:13 -07:00
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spack	Factor out URL fetching into URLFetchStrategy	2014-10-03 16:53:13 -07:00