Make IPython import optional in colorizers to fix CCO model loading

app/colorizers/eccv16.py

@@ -2,7 +2,11 @@
 import torch
 import torch.nn as nn
 import numpy as np
-from IPython import embed
+try:
+    from IPython import embed
+except ImportError:
+    # IPython not available (only used for debugging)
+    pass
 
 from .base_color import *
 

app/colorizers/util.py

@@ -4,7 +4,11 @@ import numpy as np
 from skimage import color
 import torch
 import torch.nn.functional as F
-from IPython import embed
+try:
+    from IPython import embed
+except ImportError:
+    # IPython not available (only used for debugging)
+    pass
 
 def load_img(img_path):
 	out_np = np.asarray(Image.open(img_path))