Merge ModelsBuilder in, NuGet dies on circ dependencies now

src/Umbraco.ModelsBuilder/Building/TextHeaderWriter.cs

@@ -0,0 +1,26 @@
+using System.Text;
+using Umbraco.ModelsBuilder.Api;
+
+namespace Umbraco.ModelsBuilder.Building
+{
+    public static class TextHeaderWriter
+    {
+        /// <summary>
+        /// Outputs an "auto-generated" header to a string builder.
+        /// </summary>
+        /// <param name="sb">The string builder.</param>
+        public static void WriteHeader(StringBuilder sb)
+        {
+            sb.Append("//------------------------------------------------------------------------------\n");
+            sb.Append("// <auto-generated>\n");
+            sb.Append("//   This code was generated by a tool.\n");
+            sb.Append("//\n");
+            sb.AppendFormat("//    Umbraco.ModelsBuilder v{0}\n", ApiVersion.Current.Version);
+            sb.Append("//\n");
+            sb.Append("//   Changes to this file will be lost if the code is regenerated.\n");
+            sb.Append("// </auto-generated>\n");
+            sb.Append("//------------------------------------------------------------------------------\n");
+            sb.Append("\n");
+        }
+    }
+}