Change log for User::getgrouplist

20100310	[ 1.0.2 ]
	- Operating system check (do not build on Irix, Solaris, Windows)
	- Check for availability of libc function before building

20100308	[ 1.0.1 ]
	- Include pwd.h (fix building for multiple platforms)
		Thanks to Brian De Wolf for notification
	- Use gzip instead of bzip2 for compressing distribution
		Thanks to Brian De Wolf as well for this

20091020	[ 1.0 ]
	- Initial release