Issue asset address

[benjiqq]

Something wrong I think with base58 encoding. currently investigating...

python3 colorcore.py issueasset 1LBKEjcZoPyhkm9hUb7XyM3ez3opNzXuXX 10000
Traceback (most recent call last):
  File "colorcore.py", line 35, in <module>
    colorcore.routing.Program.execute()
  File "/home/benjyz/lykke/colorcore/colorcore/routing.py", line 64, in execute
    router.parse(sys.argv[1:])
  File "/home/benjyz/lykke/colorcore/colorcore/routing.py", line 337, in parse
    func(**args)
  File "/home/benjyz/lykke/colorcore/colorcore/routing.py", line 254, in decorator
    self.event_loop.run_until_complete(coroutine_wrapper())
  File "/usr/lib/python3.4/asyncio/base_events.py", line 316, in run_until_complete
    return future.result()
  File "/usr/lib/python3.4/asyncio/futures.py", line 275, in result
    raise self._exception
  File "/usr/lib/python3.4/asyncio/tasks.py", line 238, in _step
    result = next(coro)
  File "/home/benjyz/lykke/colorcore/colorcore/routing.py", line 239, in coroutine_wrapper
    result = yield from function(controller, *args, **kwargs)
  File "/home/benjyz/lykke/colorcore/colorcore/operations.py", line 195, in issueasset
    to_address = self._as_any_address(from_address)
  File "/home/benjyz/lykke/colorcore/colorcore/operations.py", line 287, in _as_any_address
    result = colorcore.addresses.Base58Address.from_string(address)
  File "/home/benjyz/lykke/colorcore/colorcore/addresses.py", line 67, in from_string
    decoded_bytes = bitcoin.base58.decode(base58)
  File "/usr/local/lib/python3.4/dist-packages/bitcoin/base58.py", line 75, in decode
    if c not in b58_digits:
TypeError: 'in <string>' requires string as left operand, not int