ENSO prediction notebook sample (#323)

* Added ENSO prediction sample (not completed)

* Removed corrupted output

* Fixed netcdf to tif issue

* Added ENSO prediction sample - p3

* Added a few comments

* Changed the plot style

* Updated visuals

* Minor update

* Merge part 1 and 3

* Added notes

* Changed section title

* Added conclusion

Author: Yongyao

samples/04_gis_analysts_data_scientists/counting_features_in_satellite_images_using_scikit_image.ipynb

@@ -290,7 +290,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.5.3"
+   "version": "3.6.5"
   }
  },
  "nbformat": 4,