b0.4_6 Moved buffers & more debug textures

+ Added coloured lights moving in a circular motion using an SD
* Attached buffers to `Demo` rather than generating them in `render()`, so these are now accessible from other functions
* As a result of above, added textures to UI for each buffer (you can now see the emission map, occlusion map, scene map, JFA map, and distance field map in debug mode)