Adds first pass example using movie example from metaflow

examples/playlist/README.md

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+# Example showing how to take in a CSV and do something with it
+
+This example is inspired by [this Metaflow documentation](https://github.com/Netflix/metaflow/blob/master/metaflow/tutorials/01-playlist/playlist.py).
+
+
+> python my_script.py
+
+Should output something like:
+
+                               movie_title  genre_match             bonus_movie
+    0                               Avatar         True  A Low Down Dirty Shame
+    4                          John Carter         True  A Low Down Dirty Shame
+    7              Avengers: Age of Ultron         True  A Low Down Dirty Shame
+    9   Batman v Superman: Dawn of Justice         True  A Low Down Dirty Shame
+    10                    Superman Returns         True  A Low Down Dirty Shame