fix minor issues

common/src/main/java/com/dfsek/terra/biome/pipeline/TerraBiomeHolder.java

@@ -12,7 +12,6 @@ public class TerraBiomeHolder implements BiomeHolder {
     private TerraBiome[][] biomes;
 
     public TerraBiomeHolder(int width, Vector2 origin) {
-        if(width % 2 == 0) throw new IllegalArgumentException();
         this.width = width;
         biomes = new TerraBiome[width][width];
         this.origin = origin;

common/src/test/java/biome/BiomeTest.java

@@ -72,6 +72,7 @@ public class BiomeTest {
                 .addStage(new ExpanderStage(new FractalExpander(whiteNoise(4))))
                 .addStage(new MutatorStage(new BorderMutator(Sets.newHashSet("OCEAN"), "LAND", whiteNoise(1234), beachBiomes)))
                 .addStage(new ExpanderStage(new FractalExpander(whiteNoise(5))))
+                .addStage(new ExpanderStage(new FractalExpander(whiteNoise(5))))
                 .addStage(new MutatorStage(new SmoothMutator(whiteNoise(6))))
                 .build(source)).build(0);