- since version 1.1
	* add gettimeofday hook
	* add clock_gettime hook
	* fixed a bug not calling dlclose
- since version 1.0a
	* add configure script
	* use putenv instead of setenv
- since version 1.0
	* fixed arguments bug
- since version 0.5
	* options are totally new and easier
	* user specifed process runs another time system
	
