-added Highlands Theme.
-added Synergy Theme "City"*.
-adapted cliffs in Beach Theme to older changes to clifftypes.
-UI-only-Themes can now be combined with any other Theme. Use the Terrain Theme first, then the UI-only-Theme.
-added flush command to the scripts, preventing War3Patch.mpq from growing.
-changed some details concerning file replacement to reduce the size and improve the performance of the DTM**

*) best used with the new command -terrain city2
**) using sylk tables for terrain texture replacements, simplified restoration process