Remove duplication between world/chrome shaders.

glsl/shp.frag

@@ -0,0 +1,8 @@
+uniform sampler2D DiffuseTexture, Palette;
+
+void main()
+{
+	vec4 x = texture2D(DiffuseTexture, gl_TexCoord[0].st);
+	vec2 p = vec2( dot(x, gl_TexCoord[1]), gl_TexCoord[0].p );
+	gl_FragColor = texture2D(Palette,p);
+}