0.15.0

• New configuration variable floman.default.target.rebalance
• New configuration variable floman.default.target.parallelism
• Changed behaviour: The mergeFile target now does not assume any more that the target is local. If you already
  use mergeFiles with a local file, you need to prefix the target file name with file://.
• Add new -t argument for selectively building a subset of targets
• Remove example-plugin
• Add quickstart guide
• Add new "flowman-parent" BOM for projects using Flowman
• Move com.dimajix.flowman.annotations package to com.dimajix.flowman.spec.annotations
• Add new log redaction
• Integrate Scala scode coverage analysis
• assemble will fail when trying to use non-existing columns
• Move swagger and json schema support into separate plugins
• Change default build to Spark 3.0 and Hadoop 3.2
• Update Spark to 3.0.2
• Rename class Executor to Execution - watch your plugins!
• Implement new configurable Executor class for executing build targets.
• Add build profile for Spark 3.1.x
• Update ScalaTest to 3.2.5 - watch your unittests for changed ScalaTest API!
• Add new case mapping
• Add new --dry-run command line option
• Add new mock and null mapping types
• Add new mock relation
• Add new values mapping
• Add new values dataset
• Implement new testing capabilities
• Rename update mapping to upsert mapping, which better describes its functionality
• Introduce new VALIDATE phase, which is executed even before CREATE phase
• Implement new validate and verify targets
• Implement new deptree command in Flowman shell