Add distance information to voyager 1 and 2

Update Saturn Ring texture

data/assets/scene/solarsystem/planets/saturn/saturn.asset

@@ -9,7 +9,7 @@ local textures = asset.syncedResource({
     Type = "HttpSynchronization",
     Name = "Saturn textures",
     Identifier = "saturn_textures",
-    Version = 2
+    Version = 3
 })
 
 local Saturn = {
@@ -48,7 +48,7 @@ local SaturnRings = {
     Renderable = {
         Type = "RenderableRings",
         Texture = textures .. "/saturn_rings.png",
-        Size = 140220000,
+        Size = 140445000,
         Offset = { 74500 / 140445.100671159, 1.0 } -- min / max extend
     },
     GUI = {

data/assets/voyager.scene

@@ -22,6 +22,27 @@ asset.require('util/default_dashboard')
 
 local VoyagerAsset = asset.require('scene/solarsystem/missions/voyager/voyager1')
 
+assetHelper.registerDashboardItems(asset, {
+    {
+        Type = "DashboardItemDistance",
+        Identifier = "Voyager1Distance",
+        GuiName = "Voyager 1 - Earth Distance",
+        SourceType = "Node",
+        SourceNodeName = "Voyager_1",
+        DestinationType = "Node",
+        DestinationNodeName = "Earth"
+    },
+    {
+        Type = "DashboardItemDistance",
+        Identifier = "Voyager2Distance",
+        GuiName = "Voyager 2 - Earth Distance",
+        SourceType = "Node",
+        SourceNodeName = "Voyager_2",
+        DestinationType = "Node",
+        DestinationNodeName = "Earth"
+    }
+})
+
 asset.onInitialize(function ()
     openspace.time.setTime("1977 SEP 10 12:00:00")