-updated wasm build scripts

-multitheaded wasm tests
-updated dub.json
-fixed thread pool assert issue
-added windows libraries
-added demos:
 *launcher
 *simple
 *snake
 *space invaders (WIP)
 *statistics window
 *changable gui styles
 *tips window
 *profile window
 *demo window with automatic generation
 *multithreaded job updater

demos/external/sources/mmutils/thread_pool.d

@@ -537,7 +537,7 @@ else version(D_BetterC)
 				threadStart = dg;
 				handle = cast(HANDLE) _beginthreadex( null, 0, &threadRunFunc, cast(void*)&this, 0, null );
 				//int ok = pthread_create(&handle, null, &threadRunFunc, cast(void*)&this);
-				assert(handle == null);
+				assert(handle != null);
 			}
 
 			void join()