Create Not gate from primitive Nand
Create And gate from Not and primitive Nand
Add OR gate
Add XOR gate implemented as per the book (9 Nand gates)
Change XOR to use only 4 Nand gates
Add gedit's pesky temp files to gitignore
Add simple multiplexor
Improve Mux by using only 4 Nand gates rather than 8
Add demultiplexor
Add 16-bit Not gate. Built up from 2,4 and 8 bit not gates.
Add 16-bit-wise And gate
Add 16-bit-wise OR gate
Add 16-bit multiplexor (strange implementation...)