Start adding currently-unused models

SabreTools.Models/Listxml/ConfLocation.cs

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+using System.Xml;
+using System.Xml.Serialization;
+
+namespace SabreTools.Models.Listxml
+{
+    [XmlRoot("conflocation")]
+    public class ConfLocation
+    {
+        [XmlAttribute("name")]
+        public string Name { get; set; }
+
+        /// <remarks>Numeric?</remarks>
+        [XmlAttribute("number")]
+        public string Number { get; set; }
+
+        /// <remarks>(yes|no) "no"</remarks>
+        [XmlAttribute("inverted")]
+        public string? Inverted { get; set; }
+    }
+}