apply for material config

[1339354001]

Hi! @ChanganVR
I come from a research group at Zhejiang University, and we have been working on audio rendering recently. I have recently experimented with reference to soundspace 2.0, and I noticed that only the material file for mp3d is provided in INSTALLATION.md, i.e. mp3d_material_config.json. There are no material files in the guide for datasets such as gibson. So I would like to ask if you can provide us material files about these datasets.
We would be very grateful if you can!

[ChanganVR]

I've been using the same material config (mp3d's) for gibson since most semantic labels overlap and you'll only find a few categories missing, in which case the simulator will use the default material labels.