Re-add minwin gtk example

samples/minwin_gtk/minwin/all.d

@@ -0,0 +1,36 @@
+/* MinWin global import
+ *
+ * MinWin is the Minimal Window Toolkit. The goal is to provide
+ * basic cross-platform capabilities while still giving complete
+ * access to native peers and platform-specific features.
+ *
+ * Written by Ben Hinkle and released to the public domain, as
+ * explained at http://creativecommons.org/licenses/publicdomain
+ * Report comments and bugs at dsource: http://www.dsource.org/projects/minwin
+ */
+
+module minwin.all;
+
+public {
+    import minwin.app;
+    import minwin.component;
+    import minwin.window;
+    import minwin.dialog;
+    import minwin.geometry;
+    import minwin.paint;
+    import minwin.font;
+    import minwin.button;
+    import minwin.label;
+    import minwin.text;
+    import minwin.multidg;
+    import minwin.layout;
+    import minwin.menu;
+    import minwin.group;
+    import minwin.event;
+    import minwin.icon;
+    import minwin.image;
+    import minwin.combo;
+    import minwin.listbox;
+    import minwin.canvas;
+    import minwin.scroll;
+}