Fix problems related to Filament picking

[grassydragon]

All problems related to Filament picking should be fixed including:

• [x] Finding a Node that was touched from a renderable ID #96
• [x] Returning a picked renderable ID together with a Node #96
• [x] Calling event listeners on the SceneView and Nodes #96
• [x] Removing redundant methods and adding documentation #96
• [x] Moving a Node #99
• [x] Enabling scale, rotate and move transformations at the same time #113
• [x] Correctly showing the selection visualizer under a Node 66b5bf5114afe23c32c88fbc615ef91795d89ed6
• [ ] Interacting with ViewNodes (https://github.com/SceneView/sceneview-android/issues/57)