* Rename UC_OSX (and related constants) to UC_MAC
* Update UNICODE_SONG_OSX references to UNICODE_SONG_MAC
* Update UC_M_OS references to UC_M_MA
* Add UC_OSX alias for backwards compatibility
* Add deprecation warning for UC_OSX to Unicode docs
* Add UC_M_OS alias for backwards compatibility
* Update newly found UC_M_OS and UNICODE_SONG_OSX references
* Add legacy UNICODE_MODE_OSX alias, revert changes to user keymaps
* Add legacy UNICODE_SONG_OSX alias, revert changes to user keymaps
* Replace removed sounds in Unicode song doc examples
This is a place for users to put code that they might use between keyboards. If you build the keymap mine, /users/mine/rules.mk will be included in your build, and /users/mine/ will be in your path - keep these things in mind when naming your files and referencing them from other places.