refactors all the ugly "pendingX" atomic operations into a single "Event" subsystem/interface thing with two operations
moves all existing code to use this instead
also changes the "bkpt" macro to also indicate unreachable code
- properly performs gpu/backlight reset
- nukes vram so the initrd had to be moved to arm9 memory, and have its size (at least temporarily) limited to 256k
- circle pad simulates dpad keys (up, right, down, left)
- raw touchscreen data is provided but currently unused
- added a simple shared memory region thing
- fixed the 10ms delay to be _after_ the backlights are turned on, thanks to profi again
as always, other stuff I probably forgot about
- moved common.h from the ARM9 tree to the common code tree
- does proper deinit now on the ARM11 side
the bug that caused it to fail to launch some FIRMs has been fixed - it can even boot stock FIRMs
