restore ie8 compatibility
fix clipboard on old webkit versions
fix #1751 sticky selection on in IE11
fix sticky selection if editor loaded into iframe
fix tests
better fix for Array.slice on ie8
fix #1843 Double click to select word does not work for Qt QWebView
fix typo
Merge pull request #1846 from ajaxorg/old_browser_compatibility

Fix old browser compatibility issues
Merge github.com:ajaxorg/ace into xquery_refactoring
Update xqlint version