A Platform Agnostic Thread Pool for Haxe / OpenFL

With modern hardware utilizing multiple cores, it can be highly advantageous to do as much parallel processing as possible. I think the most elegant way of doing this is to use thread pools which allocate tasks to a limited number of threads. Unfortunately, multi-threading support isn’t fully implemented in Haxe—but it is on the neko and cpp targets, so I wrote a simple thread pool to take advantage of multi-threading on those platforms!