Clear enhancement and clean logs ++

* November 12, 2012 Update
* -Clear Enhancement
* -Console log for already enhanced elements 
* -Remove data-enhance for enhanced elements (enhance-***-applied become the only flag to determine if elements hanve already been enhance) so it is easy to remove this class to re-enhance element
* -Grouped log to clean the console
* -Log time and grouped log for ie
* - fix bug of elements that could not enhance itself