Litecoin LTC: Testnet Launch

"Having a chance like this to go back through the code and clean things up, re-evaluate decisions made, etc. will really pay off in terms of code quality, hopefully allowing for a smooth first testnet launch at the end of September."

A testnet is an alternative cryptocurrency blockchain, to be used for testing. Testnet coins are separate and distinct from real coins, and are not supposed to have any value. This allows application developers to experiment without resorting to using real coins and not worrying about the integrity and security of the mainnet.