Add my name to authors.

Add back in backwards compatible mouse button enum constants

dub.json

@@ -5,14 +5,14 @@
 	"authors": [
 		"ONROUNDIT"
 	],
-	"copyright": "Copyright (c) Ramon Santamaria (@raysan5), Petro Romanovych (@onroundit), Jan Hoenig (@m3m0ry)",
+	"copyright": "Copyright (c) Ramon Santamaria (@raysan5), Petro Romanovych (@onroundit), Jan Hoenig (@m3m0ry), Steven Schveighoffer (@schveiguy)",
 	"configurations": [
         {
             "name": "unittest",
             "dependencies": {
-                "fluent-asserts": "~>0.13.0",
+                "fluent-asserts": "~>0.13.0"
             }
         }
     ],	
 	"targetType": "sourceLibrary"
-}
+}

source/raylib.d

@@ -621,7 +621,12 @@ enum MouseButton
     MOUSE_BUTTON_SIDE = 3, // Mouse button side (advanced mouse device)
     MOUSE_BUTTON_EXTRA = 4, // Mouse button extra (advanced mouse device)
     MOUSE_BUTTON_FORWARD = 5, // Mouse button fordward (advanced mouse device)
-    MOUSE_BUTTON_BACK = 6 // Mouse button back (advanced mouse device)
+    MOUSE_BUTTON_BACK = 6, // Mouse button back (advanced mouse device)
+
+    // backwards compatibility support for deprecated names
+    MOUSE_LEFT_BUTTON = MOUSE_BUTTON_LEFT,
+    MOUSE_RIGHT_BUTTON = MOUSE_BUTTON_RIGHT,
+    MOUSE_MIDDLE_BUTTON = MOUSE_BUTTON_MIDDLE,
 }
 
 // Mouse cursor