What is the best way to handle all errors?

[mihalt]

Hi, @Terrance ! You know, there are a lot of strange unexpected errors in skype api like that
#285
#278
#220

Also I have on production 80+ like this SkypeApiException: ('503 response from POST https://azwcus1-client-s.gateway.messenger.live.com/v1/users/ME/endpoints/SELF/subscriptions/0/poll', <Response [503]>) in .cycle()

I should save a lot of messages online from Skype. And I really don't like when I have some messages not saved and when my app in docker container is failed due to errors like this.

So, do you have any recommendations how to handle all of them? Is the rewriting of __call__ method of a my bot class the best way out? Or do you have any better ideas how to do it in your lib?