TestNet Params

Added necessary params for the testnet

Testnet Genesis Block - 
merkle hash: 45df4ed9dbbf9073305c9129f3522aa8e6edee27ce85ce219f271f36c418f89b
pszTimestamp: Apr-15-2014 Harvard Scientists: 2013 Comet Awards Announced
pubkey: 04c6c6a01450f2b8bbb176b98f593623b04a5f5761a7d0adae4d21f77c366e01e147217a9d8864a871d95d182e01d2b003168f0fa7851278a86ac0aa682919f9a6
time: 1398173675
bits: 0x1e0ffff0
nonce: 1454211
genesis hash: 164286ca09b1282a678f54b1330b16600bc5466a3ec170f8e2ff7bddfb4fcac3