implement set videomode via json api (#457)

* implement set videomode via json api

* refactor grabbers:
- new base class
- move shared code to base class

* fix osx

* rework all cmakelist files with auto file collection. except leddevices (need further restructuring)

* store current video and grabbing mode

* add json stuff

* remove grabbingmode - we do not want to expose it

libsrc/hyperion/Grabber.cpp

@@ -0,0 +1,27 @@
+#include <hyperion/Grabber.h>
+
+
+Grabber::Grabber(QString grabberName, int width, int height, int cropLeft, int cropRight, int cropTop, int cropBottom)
+	: _imageResampler()
+	, _videoMode(VIDEO_2D)
+	, _width(width)
+	, _height(height)
+	, _cropLeft(cropLeft)
+	, _cropRight(cropRight)
+	, _cropTop(cropTop)
+	, _cropBottom(cropBottom)
+	, _log(Logger::getInstance(grabberName))
+
+{
+}
+
+Grabber::~Grabber()
+{
+}
+
+
+void Grabber::setVideoMode(VideoMode mode)
+{
+	_videoMode = mode;
+	_imageResampler.set3D(_videoMode);
+}