Updating the OptGroup/Option with new Icon properties.
Adding in Respond module for IE8 support (Issue #12)
MSIE needs to be in caps ;)
Get selected value in an IE8 compatible way.
Merge pull request #16 from jwest011/master

Get selected value in an IE8 compatible way.
Fixing the setValue method for DateTimePicker (Issue #14)
Fixing setStartDate/setEndDate and fixing the calling into show() never hide it when the textbox lost focus. (Issue #6)
Removing focus from the textbox after onHide is fired and giving focus when onShow is fired. (Issue #13)