feat #883 Adding Japanese short version of months and days

Adding the possibility to use short version of months and days in japanese.
fix #886 jsdoc problem inside Browser class

Fixing the class description for aria.core.Browser

close #887
refactor remove verbosity from DOCTYPEs

Let's just use HTML5's <!DOCTYPE html> everywhere.
Also strip some indentation in `FrameATLoaderHTML` which is deployed
unminified.

Close #876.
fix #868 Introducing allowInvalidText property for Selectbox widget

Adding the possibility to define the allowInvalidText property in order to give to the user the possibility to write whatever he wants inside the input field of a selectbox widget.
doc Validation doc in utils.Data

Close #871.
feat #870 MultiAutoComplete widget