Fix compilation for Windows Phone 8.
Add a location specifier for the equalizer. Defaults on output graph, but can be placed on input graph by specifying the "eq_loc" variable of the stream.
fix bug with vp8 "freeze on error" implementation
Set equalizer rate, otherwise it amplifies the wrong frequencies
fix mediastream bug (interval given in seconds instead of milliseconds)
Add some macros to ease error checking
Add the ability to remove voice processing by selecting "Audio Unit NoVoiceProc" as playback/capture device.

This removes the AGC, Echo canceler and the high-pass filter and renders a flat spectrum below 200Hz.
Otherwise, the high pass and echo canceler remove these low frequencies.
Add traces to the bluetooth fix and correct the frequency check (was too strict)
Select FFT size for equalizer according to the sampling rate.
Restore the smaller RTCP send interval at the beginning of a call.
Fix compilation with CMake on Linux.
Enable OPUS for the MKV recorder
Add V4L support when building with CMake.
Add definitions of V4L headers when compiling with CMake.
rework again Android sound system
* libmedia is used until 4.4 inclusive, with possibility to activate hardware AEC as before.
  FAST mode is activated on AudioTrack and AudioRecord, for devices that would support it.
  RefBase and sp<> (strong pointer) are wrapped to prevent unwanted destruction of AudioTrack and AudioRecord.

* openSLES is used starting for 4.5. Since we cannot warranty libmedia will work on 4.5, it will be used by default on future devices.
  openSLES is still lacking the possibility to activate the AEC. When google add the necessary API to do this, we should be able to definitely switch to openSLES.
Fix graph when changing camera of a video stream.
Fix leak of the GLXContext.
Fix compilation with Xv on Linux when compiling with CMake.
FIX android native sound module before 4.4 (was broken)
FIX unreleased mutex in error conditions in video capture module.
Generate the script to find the ms2 libraries with CMake according to the build options.