more .gitignore
moved schematics around a bit, added some new ones

technically the xbee one isn't a functional prototype, but it's a very
conservative change to the current breadboard version.  The current
version is as described there except it's still running on the
attiny2313a at 5V - though it is running fine at 8MHz, so switching to
3.3v should be no problem.
Added Xmega A4U based concept schematic and pcb layout

the layout is pretty ugly, but can probably be saved by making the crystal smaller and giving up on the expansion header (or reducing its size by quite a bit).
.gitignore more
Added schematic for a standalone power section

This is pretty quick and dirty but i like how it turned out so I've ordered a few.  Should be handy for trying out various SMD transistor and regulator options, and should also make a nice standalone power board for Dave's Teensy-based variant (or anyone else interested in running some of these lights using a pre-existing MCU board).