New structure of the 2.6 based Fonera firmware.

Recent changes in Kamikaze have made it possible to override virtually any
part of the package selection for new targets without modifying existing files.
All targets in target/linux/*/ are automatically indexed and can specify the
intended default package set with the DEFAULT_PACKAGES variable (see
fon/target/linux/fonera-2.6/Makefile for details).

To make it easier to stay in sync with the changes happening in Kamikaze itself
I've decided to split off all fon enhancements/modifications in a separate directory
and symlink those directories into an unmodified Kamikaze checkout (which is included
here to make sure that everybody uses the same tested version).

At the moment there are two symlinks that are used like that:

fon/package/base-files-fon	=> openwrt/package/base-files-fon
fon/target/linux/fonera-2.6	=> openwrt/target/linux/fonera-2.6

When new packages are added, please copy them to fon/package, symlink them over
and (if desired) add them to the default set of packages by editing the
DEFAULT_PACKAGES variable in fon/target/linux/fonera-2.6/Makefile

Files in openwrt/ should only be modified for the sake of syncing with changes
in OpenWrt. Let's see how this works out.

- Felix
