Added Map Tool. Partially closed #215

* User needs the `AGM_MapTool_Item` item
* Just drag on the map to move
* Shift-drag to rotate
* The graphics and code were done by myself from scratch. The map tool textures need some more work (embelishment, shadows, etc).
* Should work for every map

![arma3 2014-07-18 15-12-31-01](https://cloud.githubusercontent.com/assets/7674951/3631046/3d527414-0eb2-11e4-951f-710175e34b20.png)