fixes, fog experiments, add shaders to tree

shaders/vbocolor.vert

@@ -0,0 +1,15 @@
+#version 330
+
+layout (location = 0) in vec3 v_vert;
+layout (location = 1) in vec3 v_color;
+
+out vec3 f_color;
+
+uniform mat4 modelview;
+uniform mat4 projection;
+
+void main()
+{
+	gl_Position = projection * modelview * vec4(v_vert, 1.0f);
+	f_color = v_color;
+}