Added Equalizer support on AudioEngine class
Two public methods added :
 * int equalizerBandCount()
 * bool setEqualizerBand(int band, int value)
One private method :
 * void initEqualizer()

Settings and GUI must be made in an external plugin
Fixed minor things
Code now should fit Tomahawk's standard
Now it really should fit standard :P
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/libtomahawk/audio/AudioEngine.cpp
	src/libtomahawk/audio/AudioEngine_p.h
Added DSP callback support for VLC phonon
first draft to get rid of phonon and directly use LibVLC
totalTime and currentTime impl
More track duration calculation and seeking
little fix for duration bug
First version using libvlc instead of phonon - added QIODevice support, less debug, no more segfault
less debug for libvlc output
--no-one-instance nor recognized by libvlc new version
Merge https://github.com/tomahawk-player/tomahawk into libvlc