- moved all files to a "source" subdirectory to tidy up the GitHub project page

- started to write a readme.md

source/ChanSort.Api/Controller/ISerializerPlugin.cs

@@ -0,0 +1,21 @@
+namespace ChanSort.Api
+{
+  public interface ISerializerPlugin
+  {
+    /// <summary>
+    /// Name of the plugin, as displayed in the OpenFileDialog file-type selection combo box
+    /// </summary>
+    string PluginName { get; }
+
+    /// <summary>
+    /// Semicolon separated list of supported file types (e.g. "xxLM*.TTL;xxLV*.TTL")
+    /// </summary>
+    string FileFilter { get; }
+
+    /// <summary>
+    /// Create an object that can read/write the file
+    /// </summary>
+    /// <exception cref="System.IO.IOException">file is not of any supported type</exception>
+    SerializerBase CreateSerializer(string inputFile);
+  }
+}