Updates FMJ to r28 which implements shrinking of the audio RTP packet queue/jitter buffer.
Fix bug where default audio device was used for notifications.

Caused by the isAccessible check in AudioSystem failing.
The fix is just to remove this check (as discussed with lubo over IM)
Check in initial .gitignore
Employs packet loss concealment (PLC) for the Opus and SILK audio codecs.
Fixes recent breakage of FEC decoding in the Opus codec.
Implement a new cache handling for ZRTP

The new ZRTP cache handling implements two main topics.

The first modification reduces the number of write requests to the external
storage and simplifies overall handling of a ZRTP cache entry in the stack.

The second modification implements a new handling of the RS2 data. This will
be a topic in an upcoming revised ZRTP specification.
Add the packet counting code
Fixes multiple issues related to unplugging the last audio device and then plugging it back.
Replaces libjnawtrenderer.jnilib with a version compiled on Mac OS X 10.6
Adds additional debug/error information output in the Windows Audio Session API (WASAPI) integration.
Updates VideoLayout so that it doesn't show invisible components.
Fixes a problem in the resolution of the devices by name (which could lead to the use of audio devices from an incorrect audio system).
Adds libjitsi.jar and .idea to git ignore list
Addresses issues on Windows, betters the support for volume adjustments across the audio systems.