Generic delegate callbacks #35
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Add a new feature to call
parser:willMatch:orparser:didMatch:on the delegate whenever a rule is matched.
This adds a new
PKParserDelegateprotocol, so that the selectors aredeclared (though
PKParser.initdoes not require this protocol to beimplemented by its parameter, because this whole protocol is optional).
Move the
parser:didFailToMatch:declaration toPKParserDelegate,now that we have such a thing.