Self sending transactions are rejected

[PaulBernier]

fatd 1.0 authorize an address to be both in input and output but fat-js reject those transactions with errors Output address already occurs in inputs or Input address already occurs in inputs

[drkatz]

Please see branch https://github.com/Factom-Asset-Tokens/fat-js/tree/zero-input-zero-output-send-to-self.

I will leave this open for convenience and tracking until the branch is merged