Update to anki-2.0.4 (based on work from Christophe Fergeau <cfergeau@redhat.com>)
- Update license to AGPLv3+
- Update noupdate patch
- Add man page
- Add post/postun scripts (needed for MimeType key in anki.desktop and for
/usr/share/mime/packages/anki.xml)
- Spec file cleanup