Huge demos update

-moved C stdlib function definitions to ecs_utils.utils
-added function to calculate mix(linear interpolation) and rsqrt(fast inverse sqrt)
-added some math to vec2 (length, normalize...)
-improved renderer with possibility to use multiple materials (one per block, not perfect solution for parallel compute, but works with some requirements)
-added blending support for material (opaque, additive, mixed)
-added Android support
-added gprahical representation for mouse tools (tool_circle.d)
-added initial support for editing template components variables
-better Component and Templates listing
-added possibility to add/removes components using mouse
-move CLocation to game_core.basic and reuse in every test
-moved tools code from demos to App (now code is fully separated from demos!)
-some improvement and fixes in Snake demo, with additional systems to handle adding and removing entities
-added new demo: Particles. By now demo has several particles to spawn and support for attractors and vortexes (calculation is made as every attractor with every entity)
-fixed bug with window hover and tools
-improved tool behaviour
-added new material
-now window is always opened as maximized windowed mode
-some minor fixes and improvements

demos/compile_android.py

@@ -38,7 +38,7 @@ def compile(sources, output):
 clean = 0
 ldc_flags = '--d-version=SDL_209 --d-version=BindSDL_Image --d-version=MM_USE_POSIX_THREADS '
 #import_paths = ['source','tests']
-import_paths = ['external','external/sources', 'external/imports', 'external/wasm_imports', '../source', 'utils/source', 'simple/source']
+import_paths = ['external/android','external/sources', 'external/imports', 'external/wasm_imports', '../source', 'utils/source', 'simple/source']
 build_tests = 0
 
 for arg in sys.argv[1:]: