Add a Spark shell example for Scala 2.10 and change incorrect versions in document.
Add a Spark shell example for Scala 2.10 and change incorrect versions in document.

This PR simply corrects some typos in readme and add a example for Spark shell with Scala 2.10

Author: hyukjinkwon <gurwls223@gmail.com>

Closes #69 from HyukjinKwon/doc-description.

mattroberts297/spark-xml,mattroberts297/spark-xml,databricks/spark-xml,lokm01/spark-xml,lokm01/spark-xml,databricks/spark-xml,mattroberts297/spark-xml,lokm01/spark-xml