#===1.0.7(2007-06-11): fix CORE::die bug, add mkdirs function, modify ifnull function, modify write_file function
#===1.0.6(2007-03-20): add lwp get web page function
#===1.0.5(2007-02-09): fix bug in _time_func_is_int and is_int
#===1.0.4(2006-09-08): add function text_2_html
#===1.0.3(2006-08-18): fix date bug
#===1.0.2(2006-07-28): add function crc32
#===1.0.1(2006-07-27): fix bugs, add functions, document format
#===1.0.0(2006-06-12): first release