Change where the cache/config directory used by libjitsi is.
Update native lib used by libjitsi
update FMJ, ice4j and libjitsi jar.
Also add missing jar dependencies to libjitsi (just in case).
Fix an error where I was returning the audio rtpdump file path instead
of the video rtpdump file path.
The init method of Hammer is now static (as well as the OSGi Framework
objects.

It was change to static because the init isn't associated to a
particular instance of Hammer, and because I needed to start
libjitsi so I can use the MediaFormatFactory in MediaDeviceChooser,
before creating a Hammer instance.
update the rtpdump CaptureDevice and the class using it.