Bug 422029 - [1.8] Enable debug evaluation support for default methods

Signed-off-by: Jesper Moller <jesper@selskabet.org>
Changed project settings needed to allow compiling with JDK7 without
built files getting into git.

Signed-off-by: Timo Kinnunen <timo.kinnunen@gmail.com>
Added README.md and CONTRIBUTING.md files.

Signed-off-by: Timo Kinnunen <timo.kinnunen@gmail.com>