Issue/24 (#549)

* Implemented property animation mechanism
 * Added easing functions to Ghoul and make them usable in animation
 * Make sure that we don't leave properties around if SceneGraphNodes are deleted
 * Adding opacity settings to base renderables

modules/base/rendering/renderableplaneimagelocal.cpp

@@ -96,7 +96,6 @@ void RenderablePlaneImageLocal::deinitializeGL() {
     RenderablePlane::deinitializeGL();
 }
 
-
 void RenderablePlaneImageLocal::bindTexture() {
     _texture->bind();
 }