Add effect definition.

Assets/Cryville/Crtr/Skin.cs

@@ -32,7 +32,9 @@ namespace Cryville.Crtr {
 	}
 
 	[Binder(typeof(PdtBinder))]
-	public class PdtSkin : SkinElement { }
+	public class PdtSkin : SkinElement {
+		public Dictionary<Identifier, EffectDefinition> effects = new Dictionary<Identifier, EffectDefinition>();
+	}
 
 	public class SkinElement {
 		[ElementList]
@@ -63,4 +65,13 @@ namespace Cryville.Crtr {
 			}
 		}
 	}
+
+	public class EffectDefinition {
+		public Identifier[] args;
+		public PdtExpression duration;
+
+		[ElementList]
+		public Dictionary<SkinSelectors, SkinElement> elements
+			= new Dictionary<SkinSelectors, SkinElement>();
+	}
 }

Assets/Cryville/Crtr/SkinInterpreter.cs

@@ -13,6 +13,9 @@ namespace Cryville.Crtr {
 		readonly HashSet<string> a = new HashSet<string>();
 		readonly List<string> k = new List<string>(2);
 		protected override object InterpretKey(Type type) {
+			if (!typeof(SkinElement).IsAssignableFrom(type)) {
+				return base.InterpretKey(type);
+			}
 			s.Clear(); a.Clear(); k.Clear();
 			bool invalidKeyFlag = false, compKeyFlag = false;
 			while (true) {