Cast verbose to int for daemon RPC

Fixes #506

server/daemon.py

@@ -264,8 +264,9 @@ class Daemon(object):
 
     async def getrawtransaction(self, hex_hash, verbose=False):
         '''Return the serialized raw transaction with the given hash.'''
+        # Cast to int because some coin daemons are old and require it
         return await self._send_single('getrawtransaction',
-                                       (hex_hash, verbose))
+                                       (hex_hash, int(verbose)))
 
     async def getrawtransactions(self, hex_hashes, replace_errs=True):
         '''Return the serialized raw transactions with the given hashes.