-fixed code do cross compiling to android
-fixed build with GCC (workaround)
-added little benchmark
-several small fixes
-updated meson build (demos building, working with GCC, LDC and DMD)
-added some meson options
-added ImGUI bind for OpenGL3
-added new sprites
-added new functions to vectors
-fixed rendering rotated sprites
-small performance improvement and some bug fixes
-added animations support
-bullets get initial velocity from parent
-added partiles for fire from gun and explosion of enemies