Create README.md

Author: tmulc18

examples/README.md

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+# Criteo Data
+
+## Download
+Download the classic competition data [here]().
+Download the 1TB data [here](https://labs.criteo.com/2013/12/download-terabyte-click-logs-2/).
+
+## Processing
+### Competition data
+1. Split the file into managable chunks that will fit in memory.
+2. Process the data using the spark script.
+
+### 1TB data
+1. Unzip each file.
+2. (Optional) store the files in a new location.
+3. Process the data using the spark script.