Fixes for stable horde, kobold horde

 

Fixed issue where image conversion would fail for images downloaded from Stable Horde

Fixed kobold horde "2 per 1 second" error by self-throttling requests

Added NovelAI image gen model "nai-diffusion-2". Some users have requested this, but I haven't made it the default because it seems to be less accurate for images of objects/items than the original version.

Increased retry count for unofficial free cloud to reduce chance of total failure per turn

Fixed issue where A1111 or Kobold API url would fail to be parsed if it had a slash at the end