The u-boot package has some issues causing its build to fail under certain
circumstances. As we don't support the ZyXEL devices it's used for anyways, just
don't build it anymore.

This now includes the previously added patch.

gluon-batman-on-wan: docs

If a given commit is not included in the master branch, the update script fails.

They aren't used by default and can simply be installed through opkg if needed.

docs: Basic site documentation
docs: Basic autoupdater documentation
docs: minimal autoupdater info
docs: bump version to 2014.2

Closes #114