include the missing xml code documentations

ElectronNET.API/Entities/DisplayBalloonOptions.cs

@@ -1,9 +1,32 @@
 namespace ElectronNET.API
 {
+    /// <summary>
+    /// 
+    /// </summary>
     public class DisplayBalloonOptions
     {
+        /// <summary>
+        /// Gets or sets the icon.
+        /// </summary>
+        /// <value>
+        /// The icon.
+        /// </value>
         public string Icon { get; set; }
+
+        /// <summary>
+        /// Gets or sets the title.
+        /// </summary>
+        /// <value>
+        /// The title.
+        /// </value>
         public string Title { get; set; }
+
+        /// <summary>
+        /// Gets or sets the content.
+        /// </summary>
+        /// <value>
+        /// The content.
+        /// </value>
         public string Content { get; set; }
     }
 }