Documented verification of plugin version 4.0
Counted versions up for further development
Tagged the 4.0 source files
Corrections in the user guide and the descriptor file.
Classpath MD19.0sp3 for build
Deleted development branch 2020-01-23 after reintegrate into trunk
Plugin descriptor updated for build 4.0
Reintegrated the development branch 2020-01-23_development into trunk
Updates for build with MD 19.0sp3
Added classpath file for MD 19.0 sp3
