This should make it possible to develop the core in Eclipse without the ADT.

The flow control window will limit the amount of buffered data.

This prevents a caller from getting stale data and/or a stale EOF marker
if a previous caller didn't consume the queue.

Netlib was assuming that PEMReader would return a specific class when
parsing a public key; the latest version returns a different class.

Also patched the descriptor parser to accept fingerprint lines with or
without the opt keyword.