All changes made for 10th part of tutorial

voxel_engine.cpp - changed structure, added character controls, physics
almost all files are modified (including shaders)
+ new source directory - physics

src/window/Camera.h

@@ -17,9 +17,11 @@ public:
 	vec3 front;
 	vec3 up;
 	vec3 right;
+	vec3 dir;
 
 	vec3 position;
 	float fov;
+	float zoom;
 	mat4 rotation;
 	Camera(vec3 position, float fov);