rf24boot: A universal over-the-air bootloader for all those uCs

Apparently I’ve come up to a point, when I want to do firmware upgrades for my home automation ‘over-the-air’. Since I’m using nRF24L01 dongles, I decided to write a bootloader for that.
While my pet antares project is slowly progressing towards the 0.2-rc2 release (honestly, really slowly), I’ve added the nice and shiny RF24 library (A port of maniacbug’s arduino library to pure C with no arduino dependences) to interface with nrf24L01 2.4Ghz dongles. I also fixed a few nasty race conditions out there on the way, but those are totally a different story.
So, what’s inside: