assert that merkle_root passed to get_share is correct
fixed: don't display meaningless "punishing share for 'not all txs present'" message at start
Add "per block" to payout

Question that is asked from time to time. Most ppl thinks it is total for 24hrs of mining, but it it per block reward after 24hrs.
fixed bug in fix to subsidy calculation: subsidy adjustment was after payout calculation, so instead of fixing the problem, it just made the shares invalid
fixed up test cases
check coinbase subsidy in test_nodes
incremented versions to 11
Merge pull request #74 from Rav3nPL/patch-10

Add "per block" to payout