added rxtx (no DLLs yet) and serial support for Jython

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23376 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
4.9.99.0

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23377 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e