MFR-Forestry 'submodule'

After fighting with it for a few hours I decided git's submodule system
sucks.

Instead I present you an alternative that does exactly the same thing
but without all the ridiculous hassle and quirkiness of git's
implementation.

This version keeps both projects separated from each other. You may wish
to change the build script to compile them together instead. Totally up
to you. I don't like changing people's build scripts that much, so I
kept to my own target as much as possible.

(I did have to change a couple of things like the build.dir using
basedir. Yet another NetBeans quirk.)