fixes, fog experiments, add shaders to tree

shaders/lighting.vert

@@ -0,0 +1,21 @@
+#version 330
+
+layout (location = 0) in vec3 v_vert;
+layout (location = 1) in vec3 v_normal;
+layout (location = 2) in vec2 v_coord;
+
+out vec3 f_normal;
+out vec2 f_coord;
+out vec3 f_pos;
+
+uniform mat4 modelview;
+uniform mat3 modelviewnormal;
+uniform mat4 projection;
+
+void main()
+{
+	gl_Position = (projection * modelview) * vec4(v_vert, 1.0f);
+	f_normal = modelviewnormal * v_normal;
+	f_coord = v_coord;
+	f_pos = vec3(modelview * vec4(v_vert, 1.0f));
+}