-modified texture atlas
-fixed bug with high CPU usage (use pthread instead of builtin D multithreading)
-added new graphics
-snake now render tile coresponding to body part
-snake is destroyed after collision and emit some particles
-added some functionality to vectors
-fixed documentation issue in Manager.d
-fixed bug in EntityManager
-added better support for non-betterC unittests
-added many new unittests
-slightly improved JUnit xml output
-fixed WASM compile script
-added new textures
-fixed model texture coordinaes in demos
-some minor bug fixes in demo
TODO: demos cpu usage in non-betterC mode