Modifies automatic audio device selection to attempt to pick up capture and playback/notify from the same hardware. Fixes warnings. Adds javadocs.

Changes needed for android merge. Exposing several bundle contexts. Some public constants. Changes in sound notifications to use String as resource uri, and obtaining resource input stream and stream format info from AudioSystem, so it can be overridden in different implementations.

Renames a couple of methods upon request by Emil Ivov. Fixes an endless loop on hangup. Commits work in progress on sound notifications.

Adds more options to sound notifications and their config. Sound notifications now can use playback, notification or pc speaker device.

Commits an initial version of the libjitsi library which should be fully functional with respect to neomedia/MediaService and should be usable with and without OSGi.