Doxy, -Wall -Werror, other cleanup and organization first round

src/IO.Swagger/Models/ResponseDto/CurrencyDto.cs

@@ -0,0 +1,34 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace IO.Swagger.Models.ResponseDto
+{
+    /// <summary>
+    /// The output DTO for basic currency information
+    /// </summary>
+    public class CurrencyDto
+    {
+        /// <summary>
+        /// Gets or sets the currency identifier.
+        /// </summary>
+        /// <value>
+        /// The currency identifier.
+        /// </value>
+        public int CurrencyId { get; set; }
+        /// <summary>
+        /// Gets or sets the name of the currency.
+        /// </summary>
+        /// <value>
+        /// The name.
+        /// </value>
+        [StringLength(32, MinimumLength = 1)]
+        public string Name { get; set; }
+        /// <summary>
+        /// Gets or sets the symbol of the currency.
+        /// </summary>
+        /// <value>
+        /// The symbol.
+        /// </value>
+        [StringLength(4, MinimumLength = 1)]
+        public string Symbol { get; set; }
+    }
+}