Add Tests to fix FamilySearch#43 and FamilySearch#48

Gedcomx.Model/Collections/Emails.cs

@@ -0,0 +1,18 @@
+using System.Collections.Generic;
+
+using Gx.Common;
+
+namespace Gx.Model.Collections
+{
+    /// <summary>
+    ///  A list of reference to Emails resources.
+    /// </summary>
+    public class Emails : List<ResourceReference>
+    {
+        /// <summary>
+        /// Add an email.
+        /// </summary>
+        /// <param name="email">The address to add.</param>
+        public void Add(string email) => this.Add(new ResourceReference("mailto:" + email));
+    }
+}

Gedcomx.Model/Collections/TextValues.cs

@@ -0,0 +1,24 @@
+using System.Collections.Generic;
+using System.Linq;
+
+using Gx.Common;
+
+namespace Gx.Model.Collections
+{
+    /// <summary>
+    ///  A list of text values.
+    /// </summary>
+    public class TextValues : List<TextValue>
+    {
+        /// <summary>
+        /// Add a name.
+        /// </summary>
+        /// <param name="name">The name.</param>
+        public void Add(string name) => Add(new TextValue(name));
+
+        /// <summary>
+        /// Check if List<TextValue> is filled:
+        /// </summary>
+        public bool Safe { get { return !(this?.Any() ?? false); } }
+    }
+}