Renamed and slightly reorganized FeedbackServiceConnection in preparation for a move to a listener-oriented architecture.
Introduced a FeedbackConnectionConfiguration object.
Intermediate progress toward a listener-centric feedback service connection. Many things are broken.
Restored FeedbackServiceConnectionTest.
Added an ExpiredTokenListener interface to get expired tokens from the PushManager to callers.
Dropped FeedbackConnectionException. Renamed some test methods for consistency.
Handle feedback connection failures via the existing failed connection listener infrastructure.
Cancel feedback polling when PushManagers are shut down.
Added some docs for the new feedback-related PushManager methods.
Added docs for the ExpiredTokenListener interface.
Added docs for the FeedbackServiceListener interface.
Added missing copyright comments.
Added a PushManager as argument to the handleExpiredTokens method.
Updated the README to reflect the new feedback service interaction strategy.
Added some missing generic bounds.
s/FeedbackServiceConnetion/FeedbackServiceConnection/
Clarified an exception message.
Fixed another dumb typo.
Fix minor typo in variable name
Merge pull request #124 from relayrides/feedback_service_listener

Feedback service listener