Merge pull request #29 from MathyV/master

Added Reddcoin
Change DBL persist to False - network is too small.
don't report negative hash rates when system time goes backwards
Chnaged persist to false for BTE - p2pool network unstable
fix diff retarget for BTE
Merge https://github.com/forrestv/p2pool into forrestv
added TGC TigerCoin support