Corsica & Sardinia cleanup.
Unify clCorsica, clSardinia to clIsland and the duplicate resource placement calls using that.
Move and simplify the logic determining which texture to paint depending on height and slope to a function getCosricaSardiniaTerrain.
Inline the createTerrain to greatly increase readability while possibly reducing performance slightly.
Fix whitespace of createObjectGroup calls.
git-svn-id: https://svn.wildfiregames.com/public/ps/trunk@20296 3db68df2-c116-0410-a063-a993310a9797