Bring `createrawtransaction` up to date

[roylee17]

Known issues:

• doesn't support replaceable
• doesn't take non-address data in the 2nd parameter.

 lbcctl createrawtransaction '[{"txid": "fd967aa8217fe948cda46b58eb04a7d9af618dc31dc91fbdcde5cbf4f6bf48c4", "vout": 0}]' '{"data": "aabbccdd", "bEQbGgnLQJmmcXAtSBxzNzvUAb5DvRyM4y": 1.0}'
 
createrawtransaction command: parameter #2 'amounts' must be valid JSON which unsmarshals to a map[string]float64 (code: ErrInvalidType)

Usage:
  createrawtransaction [{"txid":"value","vout":n},...] {"address":amount,...} (locktime)

Latest spec:

createrawtransaction [{"txid":"hex","vout":n,"sequence":n},...] [{"address":amount},{"data":"hex"},...] ( locktime replaceable )

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