fix for Qt 5.1 compatibility

It seems that Qt 5.1 QtQuick engine does not recognize 'this' keyword.
delete openal in pkgconfig list
* Fix: workaround for NVIDIA driver issue which disables hardware rasterization
* Fix: FBO format woll fall back to GL_RGBA8 when GL_RGBA16 is not
available
* Fix: workaround to suppor non-8bit encoded sources for NVIDIA driver
* Fix: recognized directory as MRL(#40)
* Fix: useless value for playback percentage till start playback
* Fix: store enum values for MRL state as string rather than integer
* Fix: open file dialog at the folder where last open local media file(#40)
* Fix: keep paused state when applying preferences(#40)
update translations
update translations
update translations
* Fix: hide scrollbar in history/playlist when no scrolling is needed
update translations
* Fix: audio output channel layout didn't work
update libchardet version
update version info
fix for compilation
update PKGBUILD