Newer jce miner out 0.31a

Also ccminer-tpruvot is having issues with lyra2z. It either fails with a memory error or I get a lot of CPU validation errors and a hashrate in the TH/s, I've disabled it on my systems for now.

EDIT: the lyra2z issue is only on my rigs with a 1050 Ti, could be the intensity. Not worth worrying about though since cool and cryptodredge are faster and work.