fix clipseg loading problems

- The directory "models" in the main InvokeAI directory was conflicting
  with loading "models.clipseg". To fix this issue, I have renamed the
  models.clipseg to clipseg_models.clipseg, and applied this change to
  the 'models-rename' branch of invoke-ai's fork of clipseg.

environment.yml

@@ -37,5 +37,5 @@ dependencies:
     - -e git+https://github.com/CompVis/taming-transformers.git@master#egg=taming-transformers
     - -e git+https://github.com/Birch-san/k-diffusion.git@mps#egg=k_diffusion
     - -e git+https://github.com/TencentARC/GFPGAN.git#egg=gfpgan
-    - -e git+https://github.com/invoke-ai/clipseg.git#egg=clipseg
+    - -e git+https://github.com/invoke-ai/clipseg.git@models-rename#egg=clipseg
     - -e .

ldm/invoke/txt2mask.py

@@ -29,7 +29,7 @@ work fine.
 
 import torch
 import numpy as  np
-from models.clipseg import CLIPDensePredT
+from clipseg_models.clipseg import CLIPDensePredT
 from einops import rearrange, repeat
 from PIL import Image
 from torchvision import transforms

scripts/preload_models.py

@@ -117,7 +117,7 @@ try:
         with zipfile.ZipFile(model_dest,'r') as zip:
             zip.extractall('src/clipseg')
             os.rename('src/clipseg/clipseg_weights','src/clipseg/weights')
-        from models.clipseg import CLIPDensePredT
+        from clipseg_models.clipseg import CLIPDensePredT
         model = CLIPDensePredT(version='ViT-B/16', reduce_dim=64, )
         model.eval()
         model.load_state_dict(