Added installation model to BaseEvent

Author: adriangodong

GitHubHook/Events/BaseEvent.cs

@@ -7,5 +7,6 @@ public abstract class BaseEvent : SnakeCaseNamedObject
     {
         public Repository Repository { get; set; }
         public User Sender { get; set; }
+        public Installation Installation { get; set; }
     }
 }

GitHubHook/Models/Installation.cs

@@ -0,0 +1,9 @@
+using GitHubHook.Helpers;
+
+namespace GitHubHook.Models
+{
+    public class Installation : SnakeCaseNamedObject
+    {
+        public int Id { get; set; }
+    }
+}