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

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.

The project is now built as an Android project (via Eclipse or
ant). Tests have been moved to a separate project so they can exist
outside the Android build process. A basic Android app structure has
been created. A Bluetooth plugin for Android has been added, and the
Bluetooth plugin for J2SE has been modified to use the same techniques.