Explore possibility of Linux & *BSD support

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With Swift now being open-source, this is possible, especially with the inclusion of GCD and Foundation as part of the core libs (though they are still in development). It would certainly be an interesting exercise, but would likely depend on how much interest their would be. Collecting stats for each of these platforms can be quite varied and thus a fair amount of work. Probably would want OS X support to get to a "stable" level before diving into this.