Updating fmpp so that is uses a specific version of the free marker plugin, avoiding build failures in situations where freemarker has a failed snapshot release.
Freeze hive fmpp > freemarker plugin dependency.
DRILL-1369: Constrain code compilation cache.
DRILL-1372: Separate category B licenses into their own directory in the binary distribution.

Adding a statement about the category B licensed software in the NOTICE files and adding the appropriate reference to MIT licensed source in the LICENSE file for the source distribution.