chunked input stream

[washort]

Parsley should be able to consume input from files in chunks. Each ChunkedInputStream object should refer to a buffer, and if .tail() falls off the end of the buffer, the new ChunkedInputStream object should load a new chunk.

[jml]

For my use case, I have an input stream of edn expressions. I'd like to be able to have a function that takes that input stream and yields parsed expressions as it finds them.

Perhaps this is possible with current parsley (the protocol stuff looks promising), but a convenience API would be much appreciated.

[jml]

https://gist.github.com/jml/6875518 is an example that I think ought to work with current parsley but doesn't seem to. Perhaps I'm getting something wrong.

[jml]

And https://gist.github.com/habnabit/6885876 is an example of one that works.