Adds microphone hardware amplification for MacOSX via CoreAudio.

lib/native/mac/libjncoreaudio.jnilib

src/native/build.xml

...o/jni/org_jitsi_impl_neomedia_coreaudio_CoreAudioDevice.c

...o/jni/org_jitsi_impl_neomedia_coreaudio_CoreAudioDevice.h

src/native/macosx/coreaudio/lib/device.c

src/native/macosx/coreaudio/lib/device.h

src/org/jitsi/impl/neomedia/AbstractVolumeControl.java

src/org/jitsi/impl/neomedia/MediaServiceImpl.java

src/org/jitsi/impl/neomedia/coreaudio/CoreAudioDevice.java

...jitsi/impl/neomedia/coreaudio/CoreAudioVolumeControl.java

src/org/jitsi/impl/neomedia/portaudio/Pa.java

src/org/jitsi/util/StringUtils.java