POD is a pretty simple format to write, but it can be a big pain to deal
with reading it and doing anything useful with it. Most existing POD
parsers care about semantics, like whether a =item occurred after an =over
but before a back, figuring out how to link a L<>, and other things like
that.

Pod::Eventual is much less ambitious and much more stupid. Fortunately,
stupid is often better. (That's what I keep telling myself, anyway.)

Pod::Eventual reads line-based input and produces events describing each
POD paragraph or directive it finds. Once complete events are immediately
passed to the handle_event method. This method should be implemented by
Pod::Eventual subclasses. If it isn't, Pod::Eventual's own handle_event
will be called, and will raise an exception.