[EXAMPLE] Change teapot example to test DotBIMLoaderPlugin double-precision

[paireks]

I modified teapot-benchmark example so it maybe can present a bit more xeokit capabilities:

• there should be 10000+ teapots

• they are populated on the ~1500 meters long space

• I cannot load it in any other web viewer

• Run this example

[xeolabs]

That's excellent, thanks!