Added docstrings for Imagelab module, class, public methods and attributes

examples/demo.ipynb

@@ -230,8 +230,7 @@
     "\n",
     "In each row:\\\n",
     "`issue_type` - name of the issue\\\n",
-    "`num_images` - number of images of that issue type found in the dataset\\\n",
-    "`num_sets` - applicable in case of issues like exact duplicates and near duplicates, shows the number of sets of duplicate images found in the dataset"
+    "`num_images` - number of images of that issue type found in the dataset"
    ]
   },
   {