Finished several core parts of the sponge port

Mass block changes / chunk packet sending
AsyncWorldEdit (buggy)
Fixed world ground cover layers being generated
Fixed tab completion
Fixed plot title color
Fixed worlds unloading when no players are present
Fixed falling blocks not falling where they should
Fixed console color
Fixed chunk regeneration on full plot worlds
Other stuff

Bukkit/src/main/java/com/plotsquared/bukkit/util/block/GenChunk.java

@@ -22,7 +22,7 @@ public class GenChunk extends PlotChunk<Chunk> {
 
     public GenChunk(Chunk chunk, ChunkWrapper wrap) {
         super(wrap);
-        if ((this.chunk = chunk) == null) {
+        if ((this.chunk = chunk) == null && wrap != null) {
             World world = BukkitUtil.getWorld(wrap.world);
             if (world != null) {
                 chunk = world.getChunkAt(wrap.x, wrap.z);