[BUG #8417] responsive tab bar/accordion combo widget
[BUG #8417] always add pages to container
[BUG #8417] fixed bottom border for active tab
[BUG #8417] make sure there's always an opened page in horizontal mode
[BUG #8417] fixed styles for justified alignment in IE9
[BUG #8417] ensure buttons always have the right class
[BUG #8417] fixed styles for right and left alignment in IE9
[BUG #8417] merged CSS classes for accordion and tabs
[BUG #8417] restored original accordion styles
[BUG #8417] apply orientation class on init
[BUG #8417] move page content DOM nodes to preserve listeners
[BUG #8417] always store page height when re-rendering
[BUG #8417] use responsive tabs
[BUG #8417] use more precise selectors to prevent problems with nested widgets
[BUG #8417] remove empty page container
[BUG #8417] replaced Accordion demo with vertical Tabs; added responsive Tabs demo
[BUG #8417] updated documentation
[BUG #8417] deprecated Accordion
Merge branch 'responsiveTabs'