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.
fix #322 invalid html test

Html test contains two errors

1. disabled is a boolean attribute, so it's value should be 'disabled'
2. using border as style make testing IE painful, the returned value is "border-top/bottom/left/right"
Using color reduces the problem but anyway the return value is 'COLOR: black' : mixed case and no semicolon