Unittests and demos update

-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

dub.json

@@ -125,7 +125,5 @@
 				"tests/tests.d"
 			]
 		}
-
-		
 	]
 }