[ffulm] smaller kernel with STRIP_KERNEL_EXPORTS
[ffulm] select some default packages
[ffulm] disable MAC80211 mesh
[ffulm] make channel 13 accessible
[ffulm] only build squash image
[ffulm] remove wpad-mini

We don't use it and it pulls in a lot of dependencies.
[ffulm] banner
[ffulm] set default channel to 1
[ffulm] do not use 11n wifi

It's evil especially in a freifunk environment.
[ffulm] enable wifi on first boot
[ffulm] set essid to ulm.freifunk.net
[ffulm] add adhoc interface for batman