added attempts to Envelope
incrementing the attempts count in Receiver
refactoring ChainInvoker a little bit before introducing the Retry continuation
fully devolved the control logic out of ChainInvoker for processing messages
very minor code cleanup
set the default number of attempts on HandlerChain to one, spiked error handling code
got the generic ErrorHandler going
implemented the exception matching portion of error handlers
ErrorReport capturing all the details we want
move to error queue mechanics in the message workflow
the requeue continuation
introduced ContinuationContext as a way of making the more complex continuations work cleanly
error continuations and the ExceptionHandlerBehavior
added the ExceptionHandlerNode
fixing up after rebasing