#2004-11-29 add pod document
#2004-11-29 delete yday, wday func
#2004-11-29 add to_end_of_month func
#2004-09-09 improve str function,now str has been more powerful
#2004-09-06
#rename module to EasyDateTime to avoid namespace clashes and the code was reorganized
#2004-09-03 0.5.8 add set function
#2004-09-01 0.5.1 rename function from "toStr" to "str" 
#2004-08-30 0.5.0 beta release
#2004-08-29 0.5.0 developing
#2004-08-20 fix tiny bug in function sec 0.1.1
#2004-08-20 release DateTime 0.1.0