-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
-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
