CI and common update:

-added webpage deploymnet stage
-added separate build stage which build all binaries and generate documentation
-added Emscripten build stage for merge to master only
-added VBO batch rendering (current default, no render mode switch yet)
-fixed camera positioning calculation
-fixed buffer issue with WebGL
-added viewport scalling (at least 300 pixels height). Pixels are scalled if screen is bigger.
-center demos gameplay area
-added fullpage html template for Emscripten build

dub.json

@@ -5,7 +5,7 @@
 	],
 	"description": "Dynamic Entity Component System",
 	"copyright": "Copyright © 2018-2019, Michał Masiukiewicz, Dawid Masiukiewicz",
-	"license": "BSD",
+	"license": "BSD 3-clause",
 	"sourcePaths" : ["source\/"],
 	"excludedSourceFiles":[
 		"source\/ecs\/traits.d"