Add ruleset and skin resource stub.

Assets/Cryville/Crtr/Browsing/ResourceConverter.cs

@@ -38,4 +38,10 @@ namespace Cryville.Crtr.Browsing {
 	public class SongResource : FileResource {
 		public SongResource(string name, FileInfo src) : base(name, src) { }
 	}
+	public class RulesetResource : FileResource {
+		public RulesetResource(string name, FileInfo src) : base(name, src) { }
+	}
+	public class SkinResource : FileResource {
+		public SkinResource(string name, FileInfo src) : base(name, src) { }
+	}
 }

Assets/Cryville/Crtr/Ruleset.cs

@@ -1,5 +1,6 @@
 using Cryville.Common;
 using Cryville.Common.Pdt;
+using Cryville.Crtr.Browsing;
 using Newtonsoft.Json;
 using System;
 using System.Collections.Generic;
@@ -10,7 +11,7 @@ using System.Text.RegularExpressions;
 using SIdentifier = Cryville.Common.Identifier;
 
 namespace Cryville.Crtr {
-	public class Ruleset {
+	public class Ruleset : MetaInfo {
 		[JsonRequired]
 		public long format;
 		

Assets/Cryville/Crtr/Skin.cs

@@ -1,5 +1,6 @@
 using Cryville.Common;
 using Cryville.Common.Pdt;
+using Cryville.Crtr.Browsing;
 using Cryville.Crtr.Components;
 using Newtonsoft.Json;
 using System;
@@ -10,7 +11,7 @@ using System.Reflection;
 using System.Text;
 
 namespace Cryville.Crtr {
-	public class Skin {
+	public class Skin : MetaInfo {
 		[JsonRequired]
 		public long format;