21 update oss source

For promotion see https://github.com/xtuml/internal/blob/master/doc-internal/process/HOWTO-create-xtUML-Editor.md .  This promotion is tied to https://github.com/xtuml/internal/issues/225 .   As well as:
1) https://github.com/xtuml/internal/tree/xtuml_editor_builder
The binary xtUML Editor in xtuml/internal
2) https://github.com/xtuml/internal/tree/xtuml_editor
The source release mirror in xtuml/internal