move Maps into Resources dir

... so that it gets included in a unity build
Allow for projectors to be mounted above/below equator

By positioning the cameras above the equator, we allow
the projectors to be mounted higher, which reduces shadows.

We lose some resolution at the bottom of course (and gain it at the top)
Maps loaded from Resources

so we can build the game rather than just play in the UI
allow picking of start map
unity cruft