One *.jar file belongs to the download archive but is not needed for building:
  release/common/tools/DensiTree.jar
    Project https://github.com/rbouckaert/DensiTree needs to be
    packaged.

------------

Java files (with proper licensing) are provided in src/org. While they are close to the ones in libcommons-math-java and libandroid-json-org-java as of 30-09:2020, they are obviously not from the same version and I was unable to patch files in src/beast to use current Debian libcommons-math-java and libandroid-json-org-java. I am therefore letting the src/org folder there.
Main issues are the lack of the prototype for density in the class ParametricDistribution of libcommons-math-java and the lack of functions such as remove or getParent in the classes JSONArray and JSONObject of libandroid-json-org-java.
