Big improvement to overall quality of RPC service
* If payout fails because insufficient funds, ids get automatically unlocked
* Locked ids are now recorded as json in a file, as opposed to spitting out to command line
* Association of paid payouts with transaction is retried 5 times, finally saving the data to json file for manual retry later
* Two new commands allow unlocking pids/bids and associating transaction id from json file

Conflicts:
	simplecoin/rpc.py
Reapplies pplns est fix for share multipliers
Still messed up, should be right now
Updates scheduler to be compatible with 0.5