Skeleton code for mini-based homebrew

This code requires a powerpc-none-elf- cross compiler, devkitPro currently ships a powerpc-eabi- cross compiler which is not compatible with the project in it's current state.

Tested working with GGC/13.2.0 binutils/2.41.0

ppcskel was not written by me, but I have made some minor improvements to keep things working as compilers change.

Give your thanks to the following: (no particular order)

• Bushing (RIP)
• Andre Heider "dhewg"
• Hector Martin "marcan"
• John Kelley "wiidev"
• Sven Peter
• bLAStY
• Segher Boessenkool
• Nuke
• Bernhard Urban "lewurm"
• Sebastian Falbesoner
• Benedikt Sauter

Also, for help with testing, updates/modernization, and a USB Gecko:

• MethodOrMadness
• DeadlyFoez

Without the USB Gecko's debug output from mini, it would have taken much longer to find very very bugged compiler build and get this thing working at all.