-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/.gitignore

@@ -3,8 +3,9 @@
 !**/dub.json
 !libs/
 !*.dll
+!libs/**
 !utils/**/*.d
-!simple/**/*.d
+!source/**/*.d
 !launcher/**/*.d
 !assets/**
 !external/**/*.d