Ready to 0.8.1 release

Fix copy

Use zero

Fix warning about avg_fps

Experimental torch 2.5

Release 0.8

Upgrade deps

Do not cast to float

Do not pass seed if not given (needed for gym compatibility)

Handle tuple obs space in vectorized envs in a special way

Fix arg

Docs

Exclude

Switch to vector exp source

N envs to test vectorized source