Code is not documented

[dhowland]

EasyAVR has very poor developer documentation. We should at least comment the code.

[dhowland]

Recent work for the 3.0 Milestone has improved the situation quite a bit. The spaghetti code in the keymapper GUI has been replaced. Also there is real documentation now, though hardly any for developers.

Let's be honest with ourselves. I'm probably not going to get to this. Marking it as stalled.