SPARK-705: implement sortByKey() in PySpark
Use standard abbreviations in metrics labels
Merge pull request #38 from AndreSchumacher/pyspark_sorting

SPARK-705: implement sortByKey() in PySpark

This PR contains the implementation of a RangePartitioner in Python and uses its partition ID's to get a global sort in PySpark.
Merge pull request #45 from pwendell/metrics_units

Use standard abbreviation in metrics description (MBytes -> MB)

This is a small change - older commits are shown here because Github hasn't sync'ed yet with apache.