Sublime PICO-8 v2017.3.14

Changelog
=========

- added: automatically lowercase the file upon saving.
- added: "extcmd" function (syntax and autocomplete).
- added: raspberry pi / pocketchip gpio snippet.
- added: "forpairs" block snippet.
- added: "repeat-until" block snippet.
- added: "goto" block snippet.
- added: semantic comments inside block snippets.
- changed: updated api autocompletions to match PICO-8 0.1.10.
- changed: "forin" block snippet renamed to "forall".
- fixed: hex number highlighting when not preceded by space.
- fixed: comment start definition ("Toggle Comment" from the Command Palette).
