Tests, various issue reproductions, etc. Ignore it. :-)
How to checkout particular subdirectory: http://stackoverflow.com/questions/7106012/download-a-single-folder-or-directory-from-a-github-repo
Use SVN like: svn export https://github.com/virgo47/litterbin/trunk/issues/querydsl-npe
(trunk replaces tree/master or blob/master from URL)