diskOS installer: initial public beta

Flashes the diskOS custom UI onto the FiiO Snowsky Disc over Ingenic mask-ROM USB,
building the image from your own stock firmware. Runs from source via install.sh.

licenses/MIT-qrcodegen.txt

@@ -0,0 +1,22 @@
+QR Code generator library - license (verbatim from the source header shipped in LVGL)
+
+QR Code generator library (C)
+
+Copyright (c) Project Nayuki. (MIT License)
+https://www.nayuki.io/page/qr-code-generator-library
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+- The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+- The Software is provided "as is", without warranty of any kind, express or
+  implied, including but not limited to the warranties of merchantability,
+  fitness for a particular purpose and noninfringement. In no event shall the
+  authors or copyright holders be liable for any claim, damages or other
+  liability, whether in an action of contract, tort or otherwise, arising from,
+  out of or in connection with the Software or the use or other dealings in the
+  Software.