Log Message:
Update from version 0.19 to version 0.20.

Pkgsrc changes:
- Add more recommended dependencies
- Makefile cleanup

Upstream changes:
0.20    Fri Apr 16 23:05:10 2010
        App::Nopaste::Service::Pastie would generate warnings via
            Mechanize due to changes in http://pastie.org HTML (avar)
        Add App::Nopaste::Service::Codepeek (arcanez)