Attempt to fix Normal Lighting and Shadows on Android, also disabled fancy trees temporarily due to performance issues on android.

src/world/level/biome/Biome.cpp

@@ -143,7 +143,7 @@ void Biome::teardownBiomes() {
 Feature* Biome::getTreeFeature( Random* random )
 {
 	if (random->nextInt(10) == 0) {
-		return new BasicTree(false);
+	//	return new BasicTree(false); // temporarily disabled
 	}
 	return new TreeFeature(false);
 }

src/world/level/biome/ForestBiome.h

@@ -16,7 +16,7 @@ public:
             return new BirchFeature();
         }
         if (random->nextInt(3) == 0) {
-            return new BasicTree(false);
+         //   return new BasicTree(false); // temporarily disabled
         }
         return new TreeFeature(false);
     }

src/world/level/biome/RainforestBiome.h

@@ -13,7 +13,7 @@ class RainforestBiome: public Biome
 public:
     Feature* getTreeFeature(Random* random) {
         if (random->nextInt(3) == 0) {
-            return new BasicTree(false);
+        //    return new BasicTree(false); // temporarily disabled
         }
         return new TreeFeature(false);
     }

src/world/level/tile/Sapling.h

@@ -92,7 +92,7 @@ public:
 //             }
         } else {
             if (random->nextInt(10) == 0) {
-                f = new BasicTree(true);
+//                f = new BasicTree(true); // temporarily disabled
             } else
                 f = new TreeFeature(true);
         }