The 3.0.1 release (which is compatible with Spark 2.0.0 or higher) includes the following bug fixes:

• Fix NullPointerException when using Kryo serialization (#147, #148, #170).
• Close input streams to avoid a resource leak which could cause reads to hang (#156, #174)

In addition, the README examples have been updated to use SparkSession instead of SqlContext (which is deprecated as of Spark 2.0).