1.6.13 released

Use jEditor 1.2.34
Use jSoup 1.21.2
Fix some cases when inserting a text in the editor would not be performed at the correct place
Improve the caret management after inserting text in the editor
Support the group schema construct in the editor
Add a Main class to get the version of the Swing or JavaFX help library
Add an option to show on the command line the version of the tool and the JRE used for the generation