Some report from tests

[kororro]

Hi, thanks for these cs bindings.

Just downloaded these from git, and tested all tests:

• texture explosion crashes (but if starting from that test, it works)
• billboard test doesnt use alpha like in https://www.raylib.com/examples/web/models/loader.html?name=models_billboard
• pbr test, that helmet looks gray, material doesnt work?
• models_mesh_generation crashes when tested tests before that, but when starting from that, it works
• audio tests only first one works, others does not have audio (but works if only one test is tested)

I know that in a real game nobody shuts down and recreates window&audio tens of time, but because there is issues, I think it is that disposing/releasing (ie audio) isnt working (or used, havent checked the code).

So all tests works, but not directly.