Add option to give every object a nametag

or change the nametag text of players

src/content_cao.h

@@ -70,7 +70,6 @@ private:
 	scene::IAnimatedMeshSceneNode *m_animated_meshnode;
 	WieldMeshSceneNode *m_wield_meshnode;
 	scene::IBillboardSceneNode *m_spritenode;
-	video::SColor m_nametag_color;
 	scene::ITextSceneNode* m_textnode;
 	v3f m_position;
 	v3f m_velocity;