2017-11-03 Sy Han Chiou <schiou@utdallas.edu>
	* Major make over
	* Cleaned the R codes
	* New data structure: Time, id, event, status
	* Added cox.LWYY and generalized scale model
	* Added nonparametric methods
	* Added event plot
	* updated maintainer contact
2015-10-30 Sy Han Chiou <schiou@hsph.harvard.edu>
	* Version updated to published version. 
	
	
