v0.2.2

This Release contains several fixes necessary for the nostrmarket usage (and valid for general use):

• event should be considered unique in the context of a subscription. See comment here
• do not share the subscriptions object between relays (see here)
  • changes by the first relay affected the state of all the others, resulting in errors
• fix: separate handling of "REQ" and "CLOSE"
• fix: removing last relay stops all relays (lambda in loop)
• fix: do not re-connect all relays when a new relay is added
• feat: init relay state when added to the list
• fix: do not lose all subscriptions when the last relay is added
• fix: init new relay with all previous subscriptions
• feat: add predefined list of relays to the UI
• chore: remove un-used files. Backward compatibility lost with the original library
• error threshold reached (what if months pass?). Threshold should be per day.
• revive relay after 2 hours from the last error threshold
• show last 20 NOTICE messages on UI
• show last 20 error messages on UI (for each relay)