Code cleanup; Reader classes renamed to Decoders, Writers to Encoders, every Decoder must have a corresponding Settings class now just like Encoders. UserDefinedEncoders renamed to CommandLineEncoders, etc.

CUETools.Codecs/UserDefinedDecoderSettings.cs

@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.ComponentModel;
+using Newtonsoft.Json;
+
+namespace CUETools.Codecs
+{
+    [JsonObject(MemberSerialization.OptIn)]
+    public class CommandLineDecoderSettings : AudioDecoderSettings
+    {
+        public override string Name => name;
+
+        public override string Extension => extension;
+
+        public CommandLineDecoderSettings()
+            : base()
+        {
+        }
+
+        public CommandLineDecoderSettings(
+            string _name,
+            string _extension,
+            string _path,
+            string _parameters)
+            : base()
+        {
+            name = _name;
+            extension = _extension;
+            Path = _path;
+            Parameters = _parameters;
+        }
+
+        [JsonProperty]
+        public string name;
+
+        [JsonProperty]
+        public string extension;
+
+        [DefaultValue(null)]
+        [JsonProperty]
+        public string Path
+        {
+            get;
+            set;
+        }
+
+        [DefaultValue(null)]
+        [JsonProperty]
+        public string Parameters
+        {
+            get;
+            set;
+        }
+    }
+}