doc Fixed some typos in comments and error messages
feat #319 array of listeners in aria.html.Element
feat #309 vertical splitter implementation

feat #309 vertical splitter implementation

feat #309 vertical splitter implementation

feat #309 vertical splitter implementation

feat #309 vertical splitter implementation

feat #309 vertical splitter implementation

feat #309 vertical splitter implementation

feat #309 vertical splitter implementation

feat #309 vertical splitter implementation

feat #309 vertical splitter implementation

feat #309 vertical splitter implementation
fix #313 suboptimal encoding of non-ASCII resources

Removed unnecessary escaping of some characters.
Added Polish special chars to Polish resources.

Pull request #317.