Improves the hotplug response times on Windows which may be noticeably prolonged due to thread scheduling in cases of Windows Multimedia reporting lack of a device driver.

Uses device UID or name (instead of index) for PortAudio CaptureDeviceInfo locator. This fixes the problem of starting/stopping the wrong device after an update of the device list (i.e. a device has been dis/connected.).

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

Shortens the time it takes the PortAudio integration on Windows/WMME to react to the detection that an audio device has been unplugging.

- Removes the DirectSound support from PortAudio in order to prevent issues with bad audio quality.
- Attempts to recognize USB PortAudio devices on Windows as such, ignores the virtual Microsoft Sound Mapper devices to avoid user confusion. Contributed by Vincent Lucas.

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.