Making non-square regions work, and fixing some region size issues.
Big worldmap improvement on var-regions and non-square regions, no more blurry map. Terrain normal mapping using hightmap also works now (sortof terrain emboss effect so have idea of hight in worldmap). And fixed high terrain texture glitches.
Fix texture issues on worldmap generation, no more "Failed to decode terrain texture"
Merge pull request #120 from nhede/master

Non-square regions, and WorldMap generation fixes and improvements. Also fixed the "Failed to decode texture" issue