Update release URL to the latest version and new github release location.


git-svn-id: svn+ssh://svnrepo/projects/nitpick/trunk@7275 561c3618-0fe6-0310-b5d6-fc65c73fee30
Add a note in the manual on where the mailing list is.


git-svn-id: svn+ssh://svnrepo/projects/nitpick/trunk@7276 561c3618-0fe6-0310-b5d6-fc65c73fee30