Readme Formatting

README.md

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 # References
 
 Essential sbt: https://www.scalawilliam.com/essential-sbt/
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 Explore Spark Interactively (supports autocompletion with tabs!): https://spark.apache.org/docs/latest/quick-start.html
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 Scallop Argument Parsing: https://github.com/scallop/scallop/wiki
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 Spark Resilient Distributed Dataset (RDD): https://spark.apache.org/docs/3.0.1/api/scala/org/apache/spark/rdd/RDD.html