Reverted to previous code

Unfortunately, it turns out that we were not able to make any progress this weekend on lost blocks. While we eliminated several causes of lost blocks, a new regression occurred and it caused more blocks to be lost than they initially were. We couldn't allow the test pool to continue to lose blocks, so we reverted to the code that was running last week.

Lost blocks are difficult to test without having a miner to run on the development server. Chris is looking into sourcing a scrypt miner so that he can find blocks at a fast rate on the development server, which means we won't have to interrupt mining on this server from now on.