add glow to rulehint and travelcenter entities,

resize travelcenter entities,
improve travelcenter entity textures

nodes.lua

@@ -390,38 +390,43 @@ minetest.register_entity("illuna:rulehint", {
     visual_size = {x=3,y=3},
     collisionbox = {0},
     physical = false,
+    glow = 10,
     textures = {"illuna_rulehint.png"},
 })
 
 minetest.register_entity("illuna:travelcenter_ne", {
     visual = "sprite",
-    visual_size = {x=3,y=3},
+    visual_size = {x=2.5,y=2.5},
     collisionbox = {0},
     physical = false,
+    glow = 10,
     textures = {"illuna_travelcenter_ne.png"},
 })
 
 minetest.register_entity("illuna:travelcenter_nw", {
     visual = "sprite",
-    visual_size = {x=3,y=3},
+    visual_size = {x=2.5,y=2.5},
     collisionbox = {0},
     physical = false,
+    glow = 10,
     textures = {"illuna_travelcenter_nw.png"},
 })
 
 minetest.register_entity("illuna:travelcenter_se", {
     visual = "sprite",
-    visual_size = {x=3,y=3},
+    visual_size = {x=2.5,y=2.5},
     collisionbox = {0},
     physical = false,
+    glow = 10,
     textures = {"illuna_travelcenter_se.png"},
 })
 
 minetest.register_entity("illuna:travelcenter_sw", {
     visual = "sprite",
-    visual_size = {x=3,y=3},
+    visual_size = {x=2.5,y=2.5},
     collisionbox = {0},
     physical = false,
+    glow = 10,
     textures = {"illuna_travelcenter_sw.png"},
 })