Marcos Dione: ayrton-0.5

I forgot to mention: last night I finally got to release ayrton-0.5. This has a major update to the language, thanks to our new parser, craftily thieved out of pypy. Other similar changes might come soon. Meanwhile, here's the ChangeLog:

• Much better command detection.
• CommandNotFound exception is now a subclass of NameError.
• Allow Command keywords be named like -l and --long-option, so it supports options with single dashes (-long-option, à la find).
• This also means that long-option is no longer passed as --long-option; you have to put the dashes explicitly.
• bash() does not return a single string by default; override with single=True.
• Way more tests.
• Updated docs.

Get it on github or pypi! You can always find everything about ayrton in its GitHub page.

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