Add the default tooltip class

Signed-off-by: jssoscar
Version: 2.0.3
Date: 2014-4-29 15:59:23
Add the default tooltip class nomatter whether define the customer style or not

Signed-off-by: jssoscar
Version: 2.0.3
Date: 2014-4-29 16:01:18
Fixed the style bug

Signed-off-by: jssoscar
Version： 2.0
Date：2014-4-30 11:27:37