Execute swift script with Cmd+R
Run: save document before running
Run: add osx sdk path as argument to enable import of Cocoa
Update language grammar and add snippets

Create a few helpful snippets, add syntax features. Add license info of syntax used as a starting point.
Improve run command

Add TextMate.save_if_untitled('swift'), chang the ruby shebang, and make the run command itself more generic.

Signed-off-by: nemesit <nemesit@myriadvisuals.com>
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Match invocation method from Shell Script bundle

This adds a swift⇥ shebang snippet to work in any document and enhances the env⇥ snippet when used in a swift document. The snippets will only fire when used at the very beginning of a document.