Add OpenCAP alias support

[wagslane]

OpenCAP aliases will help make transactions much more user-friendly. For example, sending and receiving to an alias like "lane$coin.space".

Protocol: https://github.com/opencap/protocol

Reference Server: https://ogdolo.com

I plan on helping, but it would be great to have some "setup local development" documentation. I posted my issue with getting started in the appropriate issue: #17

[Ziyad009]

Thanks