PySpark, Codeless init, Uber JAR, 'saveAsTable' etc, bugfixes

In addition to bugfixes and performance improvements this release introduces the following features:

1. PySpark support
2. Codeless initialization (via spark.sql.queryExecutionListeners property)
3. Support for saveAsTable, insertInto commands and JDBC datasource.

Also Spline is now available as an uber-JAR.