0.14.0

• Fix AWS plugin for Hadoop 3.x
• Improve setup of logging
• Shade Velocity for better interoperability with Spark 3
• Add new web hook facility in namespaces and jobs
• Existing targets will not be overwritten anymore by default. Either use the --force command line option, or set
  the configuration property flowman.execution.target.forceDirty to true for the old behaviour.
• Add new command line option --keep-going
• Implement new com.dimajix.spark.io.DeferredFileCommitProtocol which can be used by setting the Spark configuration
  parameter spark.sql.sources.commitProtocolClass
• Add new flowshell application