-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
*updated build scripts
*removed tls variables from code (needed to support WebAssembly)
*some mmutils tweaks
*some fixes
*pthread TLS thread ID implementation
-added Atomic file (reimplementation of atomics templates for emscripten)
-added emscripten support to ecs.std
