* enable PrimitivePicking to enable picking on point clouds
* use OnDemand render policy
* activate FrustrumCulling + increase far plane
* add management of rasterized OpenGL points via a PointSize render
This commit adds several components to centralize and extend 3D media loading. They are not yet integrated into Viewer3D. The entry point to this system is the MediaLibrary component that:
* can load N medias based on a filepath or load-and-watch node attributes
* provides a cache mechanism to instant-reload medias that were unloaded under certain conditions
* gives access to statistics (vertex/face/camera/textureCount) through a unified interface
