Switch from SoftwareSerial to AltSoftSerial
Now it actually compiles. Yays!
Added usage info to the README
added requirements to README
added example sketch for Atlas Shield
support & example for using Atlas without a MUX
added documentation & example for no-MUX mode
Added Fritzing part for 74HC4052 chip
images for breadboard & PCB, PDF for schematic
added bill of materials for Atlas Shield