Release version

Prepare the package for release. A non-exhaustive list of tasks includes:

• make documentation
• prepare examples and tutorials
• make the package installable
• fix randomly failing tests

and likely many other things that I fail to recall now.

pymf/tb/tb.py

@@ -39,5 +39,5 @@ def scale_tb(tb, scale):
 
 def compare_dicts(dict1, dict2, atol=1e-10):
     """Compare two dictionaries."""
-    for key in dict1.keys():
+    for key in frozenset(dict1) | frozenset(dict2):
         assert np.allclose(dict1[key], dict2[key], atol=atol)