Add examples to show additional features of sort

Save data files in a seperate folder "Data" so user do not have to
download all the data files required in the notebook

Author: lokeshh

Data Analysis/Basic Time Series.ipynb

@@ -885,7 +885,7 @@
    "name": "ruby"
   },
   "language_info": {
-   "file_extension": "rb",
+   "file_extension": ".rb",
    "mimetype": "application/x-ruby",
    "name": "ruby",
    "version": "2.2.1"