Changes for EMC2 and Charity donation.

[bhmahler]

I am trying to get this working with Einsteinium and I can't seem to get the daemon to accept the block. I added in some code for the donation but I think I am doing something wrong. Any help would be appreciated. These are the changes I see in the EMC2 stratum mining repo https://github.com/einsteinium/EMC2-Stratum-Mining/commit/0402833ec347819948b19b241aae454883040188