Release v0.0.16

Changelog

8346b19 Added TxFromHex method
10f4e7e Added package docs
359d1e8 Creating a basic example of making a Tx
492ebc3 Fixed misspelling
f2edcf4 Merge pull request #2 from BitcoinSchema/feature/transactions
6b1eb68 Minor edits to sponsor link, added security notes
833c327 Single vs plural
e7528b8 Upgraded deps
05cd38a Upgraded deps
43c2508 multiple op_returns, support raw bytes