Update FAS to MagicDraw 2021x
Entered the 4.0 release date in the compatibility overview
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