In order to build this you will need:
- perl (>=5.6.0)
- perl module Digest::SHA1 (for debian: apt-get install libdigest-sha1-perl)
- gettext 0.11.x

Also beware: old installation of libco might make "make check" fail on
"mod" test...

libco 0.2.2
	- improved plugin system, added module loading testcase
	- renamed various __mod_init functions, so their purpose is clearer from
	  the name
	- improved and cleaned up documentation
	- began porting to win32-cygwin
	- destroying co_super cleanly shuts the program down
	- cleanups