v0.9.4

• Various bugfixes and stability improvements throughout, mostly around multi-device rendering
• support ANARI 'cone' geometry, including attribute mapping (samples in upcoming pynari) (thx @szellmann )
• support ANARI 'quad' geometry (thx @szellmann )
• support ANARI 'cylinder' geometry, including attribute mapping (samples in upcoming pynari) (thx @szellmann )
• no longer doing automatic tone mapping; default frame buffer now linear, only SRGB format does srgb conversion
• embree backend has embree globals moved in special namespace, no longer clashing with other embree apps