bitcoin-submittx, improved

https://github.com/AndySchroder/bitcoin-submittx

- TOR stream isolation.

- Switch to PySocks.

- Auto fetch peers from DNS seeds.

- Scan a QR code of a signed transaction from Sparrow Wallet.

- Optionally accept transaction from STDIN and not the command line.

- Selectable logging levels.

- Installable via pip.

- General code cleanup and usability improvements.

- Remove shitcoinery.