Updated miners + Optimizations

*Added CCMiner-Xevan for Xevan algo (NVIDIA)
*Added CCMiner-Polytmos for Polytmos algo (NVIDIA) (thx MikeBuzz)
*Added Nsgminer for Neoscrypt (AMD)
*Upgraded prospector to 0.0.13-ALPHA
*Upgrade Excavator to v1.3.7a
*Upgrade CCminer-Klaust to 8.15
*Added to Suprnova.cc: STACKS (STACK), POLYTMOS (POLY)
*Nvidia optimized miner for each algorithm
*Live config.txt, now you can change config.txt values without restarting MM
*Changed donation mechanism, now donation is always on MiningPoolHub

*Fixed: sometimes benchmark for dualmining is saved with second algo zero value
*Fixed: claymore Cryptonote not working due to wrong parameters
*Fixed: incorrect live profit shown on Automatic24h mode
*Fixed: ahashpool Automatic24h mode not working