[Scout Help] create the initial structure for SDK description.
[Scout Help] add Icons Editor
[Scout Help] add Nls Editor (first step)

* use hyperref package
* add a new command \subseclabel
* add commands: \scoutExplorerView and \scoutPropView to mention or link the views.
* use the commands in the SdkEditorIcons module.
* refactor SdkEditorNls (and ScoutTooling) to share screenshot (renamed) and text.
* prepare new wizard pages (add a language and new text entry)