Upgrade project style

SourceGit/Git/Decorator.cs

@@ -0,0 +1,21 @@
+namespace SourceGit.Git {
+
+    /// <summary>
+    ///     Decorator type.
+    /// </summary>
+    public enum DecoratorType {
+        None,
+        CurrentBranchHead,
+        LocalBranchHead,
+        RemoteBranchHead,
+        Tag,
+    }
+
+    /// <summary>
+    ///     Commit decorator.
+    /// </summary>
+    public class Decorator {
+        public DecoratorType Type { get; set; }
+        public string Name { get; set; }
+    }
+}