Fix issue for Templecon - P2Pool

Please refer to [login to view URL] [login to view URL] Fix the problem: [login to view URL] large number of small amount contains in that transaction can't stuck the pool 2. Polish this source code totally for Templecon How to reproduce this problem: 1. Setup the tpc-p2pool on your own server using the testnet 2. Mine about 1 day with cpu power is enough, it will come a lot 0.001 transactions to your wallet. 3. send about 0.1 amount to another wallet, it will stuck the p2pool and never solve block anymore.