make use of pybitshares cycle though api nodes at disconnects

[MarkoPaasila]

From Xeroc:

Pro tipp: you can give pybitshares a list of endpoints and it will cycle thru them automatically on disconnects..

So could we make use of this? 50% of problems users experience are related to node issues, and this could help a lot (number not verified).

Having the list in the config file would allow users to modify the list; adding their own nodes and removing the rest, removing distant nodes, or adding new ones...