test for building/testing dist against perlbrew

to install required dependencies in all available perls make sure
to run:

	for perl in $(perlbrew available | grep '^i' | awk '{print $2}');
	do perlbrew switch $perl;
	cpan CGI;
	cpan FCGI;
	done

then run:

	DEV_TESTS=1 perl t/dev/001_perlbrew.pl