Try to reconnect on pool duplicates

reduce log announces and define uchar in miner.h
x11: echo and cubehash optimization

echo : 40.056ms -> 39.241ms
cube : 14.490ms -> 13.511ms

cube hash change look like useless (__device__ code in generally inlined)
but the reality proves that cuda documentation is wrong...

tpruvot: fixed dos lines ending in echo,
and used my style for cuda function attributes