docs: more work on docs

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

Closes #114
docs: move from README to docs/
readme: fix link to getting started guide
docs: document configmode
Never include USB modules by default

They aren't used by default and can simply be installed through opkg if needed.
Strip luci libraries to save some space
busybox: prefer IPv6 over IPv4
Update gluon packages
Update Gluon packages
Allow specifying a branch for a module

If a given commit is not included in the master branch, the update script fails.
Update Gluon packages
docs: typos/fixes
gluon-batman-on-wan: docs
ath9k: add experimental patch
Merge pull request #134 from freifunk-gluon/batman-on-wan

gluon-batman-on-wan: docs
check_site_lib: add need_boolean check
Update Gluon packages
Update site documentation
README: mention mailinglist
Add an iptables package fix and a dnsmasq patch