Update explanation for newly added features.

[PhoenixEugene]

Hello. This Colab has been a God-send ever since I found it and I can't thank you enough for making it. I was just wondering if it was possible to update the Rentry guide page to include the newly added options and their purpose. More specifically the 'dpmpp_v2', 'all_control_models', 'all_diff_control_models', 'all_t2iadaper_models', and 'null_model'.

If those options are supposed to be self-explanatory, and that's why there was no need to add an explanation for them, then I'm sorry, I'm really not that familiar with everything Stable Diffusion related and I didn't want to break anything by ticking a box for something I didn't understand.

In any case, thank you for everything.