Add hardware node coloring. Includes:

- Increase ContentFeatures serialization version
- Color property and palettes for nodes
- paramtype2 = "color", "colored facedir" or "colored wallmounted"

src/mesh.h

@@ -23,6 +23,12 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "irrlichttypes_extrabloated.h"
 #include "nodedef.h"
 
+/*!
+ * Applies shading to a color based on the surface's
+ * normal vector.
+ */
+void applyFacesShading(video::SColor &color, const v3f &normal);
+
 /*
 	Create a new cube mesh.
 	Vertices are at (+-scale.X/2, +-scale.Y/2, +-scale.Z/2).
@@ -48,11 +54,7 @@ void translateMesh(scene::IMesh *mesh, v3f vec);
 */
 void setMeshColor(scene::IMesh *mesh, const video::SColor &color);
 
-/*
-	Shade mesh faces according to their normals
-*/
-
-void shadeMeshFaces(scene::IMesh *mesh);
+void colorizeMeshBuffer(scene::IMeshBuffer *buf, const video::SColor *buffercolor);
 
 /*
 	Set the color of all vertices in the mesh.
@@ -87,7 +89,7 @@ void rotateMeshYZby (scene::IMesh *mesh, f64 degrees);
 scene::IMesh* cloneMesh(scene::IMesh *src_mesh);
 
 /*
-	Convert nodeboxes to mesh.
+	Convert nodeboxes to mesh. Each tile goes into a different buffer.
 	boxes - set of nodeboxes to be converted into cuboids
 	uv_coords[24] - table of texture uv coords for each cuboid face
 	expand - factor by which cuboids will be resized