Added Optiboot 4.4 (http://code.google.com/p/optiboot/) as main bootloader.
Moved 'optiboot' sources to the Arduino hardware bundle directory for the Babyduino variants.
Removed prebuilt bootloaders from the repository.
Added 'babyduino8_nc' and 'babyduino168_nc' targets.
Modified 'makeall' to only make the 'Babyduino' bootloaders to avoid confusion.
Added prebuilt versions of the 'Babyduino' bootloaders.
Added initial 'boards.txt' to describe the 'Babyduino' variants.
Added initial circuit diagrams.