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/graphics/Shader.h

@@ -13,6 +13,10 @@ public:
 
 	void use();
 	void uniformMatrix(std::string name, glm::mat4 matrix);
+	void uniform1i(std::string name, int x);
+	void uniform1f(std::string name, float x);
+	void uniform2f(std::string name, float x, float y);
+	void uniform3f(std::string name, float x, float y, float z);
 };
 
 extern Shader* load_shader(std::string vertexFile, std::string fragmentFile);