recommendation: url protocol for bitcoin-links

[earonesty]

It would make more sense for it there to be an RFC for general purpose payment links:

payment://<currency>/<amount>?url=<url>

These links could be handled by any payment provider.   A user could then set up payment providers for any currency.   This type of general purpose scheme is more likely to accrue broad based browser and W3C support, etc.... rather than a one-off for one crypto.

- Erik