Timeout Handling

[canerdianeh]

When performing API calls, I occasionally (but regularly and consistently) get client side timeout errors on the pycentral module which doesn't appear to be handling them well - usually a retry clears it right up, so it would probably be useful to to a better job of catching that particular exception or setting a retry count as well as a timeout value when creating the pycentral object, which can then be passed on to the requests module (it currently appears to be 60 seconds).