original xrick code by 'BigOrno' at:
http://www.bigorno.net/xrick/
Rockbox port, plus bugfixes at:
https://github.com/pierluigi-vicinanza/xrick
Further changes:
* Additonal fixes from g#3026
* Port to modern plugin API
* Add Pluginlib keymap fallback
* Support all >1bpp screens
* Fix build warnings in miniz
* Better error message when resources are missing
Change-Id: Id83928bc2539901b0221692f65cbca41389c58e7
