0.8.5

- Fix #43 - In IE8 whole window becomes black when YouTube iframe is
closed
- Fix #51 - In IE9 YouTube HTML5 video keeps playing after iframe is
removed from page
- Bugfix: box-sizing on IMG in low IE behaves incorrectly
- removalDelay option is now ignored in IE
- Added an option closeOnBgClick (closes #56)
- Added BeforeChange callback
- Added AfterChange callback