Change AHK settings to read from API response

[aaronklaassen]

This is deployed: https://github.com/winnitron/winnitron_reborn/pull/77 It adds keys: { template: "something" } } to the game API response.

• [x] SYNC: take that data and write it as-is (including the nesting) to winnitron_metadata.json
• [x] SYNC: don't write the legacy_controls key
• [x] AHK: check the metadata json for which key map script to use.
• [x] OPTIONS: remove all references to legacy_controls
  • this is no longer needed - it's the equivalent of template == "legacy"

Valid values for the template key are (this list is easy to add to):

• default
• custom
• legacy
• flash (#44)
• pico8

No games are custom yet because we haven't, you know, built that.

[mrmwiebe]

Cool. Gonna do some rewriting of the way it handles templates first and then I'll get to this.

[mrmwiebe]

should be g2g with the latest commit 278a153