Midship island released

Midship has sent us his typedemo island, it features reduced cell sizes to increase details and enhance the terrain variety. Check the readme before installing it!

Overview : The island shows the properties of a terrain resolution at 1,5m cell size (instead of 50m). This is useful for CQB theatres where detailed terrain is demanded.
For comparison, the demo uses intentionally the most basic OFP objects and textures. The island extends over 10000 squaremeters at 4096 cells.