Added comment to IModifiedPhrase

TxlData/IModifiedPhrase.cs

@@ -6,11 +6,16 @@
 //		Distributable under the terms of the MIT License (http://sil.mit-license.org/)
 // </copyright>
 #endregion
-//
-// File: IModifiedPhrase.cs.cs
 // ---------------------------------------------------------------------------------------------
 namespace SIL.Transcelerator
 {
+	/// <summary>
+	/// Represents a phrase/question that the user modified (even if that modification was
+	/// later superseded by a subsequent program change that added the modified version).
+	/// </summary>
+	/// <remarks>Technically, we wouldn't need this interface since the only class that
+	/// implements it is in this same assembly, but it wouldn't have to be implemented like
+	/// that, and using this interface clarifies the properties we actually care about.</remarks>
 	public interface IModifiedPhrase
 	{
 		string Reference { get; }

TxlData/IPhraseTranslationHelper.cs

@@ -9,7 +9,6 @@
 // 
 // File: IPhraseTranslationHelper.cs
 // ---------------------------------------------------------------------------------------------
-using SIL.Transcelerator.Localization;
 using System.Collections.Generic;
 using System.Globalization;