Integrating yadio.io on pricenode

[HostFat]

https://yadio.io
https://yadio.io/api.html
https://api.yadio.io/exrates

Yadio collect many offers from different p2p markets, and thanks to his data, it will then possible to easily solve this issue:
bisq-network/bisq2#2310

Also, by solving this other issue:
bisq-network/bisq-website#489

It will be then possible to let Yadio indexing even the Bisq offers, adding more interest from other user on trying Bisq as alternative.