keypair.go: code for generating a bitcoin key pair (including its public address).
spend.go: code for generating a bitcoin transaction.
This is intended for learning and exploration only! IT WOULD BE VERY
FOOLISH TO SEND ANY SIGNIFICANT FUNDS TO ADDRESSES GENERATED OR USED IN
THIS CODE.
Credits: the code was written by Nick Skelsey and Alex Kuck for the
University of Virginia's cs4501: Cryptocurrency Cafe course, Spring
2015.