[installer] massaged things a little
[installer] massaged things a little

More exactly, the sub download() now only downloads, it doesn't check for
deps. There's no longer a global @build_queue. The criterion for downloading
a dependency was widened not to include a check for a Makefile in the project
since projects might not have a Makefile.PL.

perl6/modules.perl6.org,masak/proto,perl6/modules.perl6.org,perl6/modules.perl6.org,masak/proto,masak/proto,perl6/modules.perl6.org