Add SimonVT's android-menudrawer. This will be used in the menu interface for Dolphin Android.

Externals/android-menudrawer/README.md

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+MenuDrawer
+==========
+
+A slide-out menu implementation, which allows users to navigate between views
+in your app. Most commonly the menu is revealed by either dragging the edge
+of the screen, or clicking the 'up' button in the action bar.
+
+
+Features
+--------
+
+ * The menu can be positioned along all four edges.
+ * Supports attaching an always visible, non-draggable menu, which is useful
+   on e.g. tablets.
+ * The menu can wrap both the content and the entire window.
+ * Allows the drawer to be opened by dragging the edge, the entire screen or
+   not at all.
+ * Can be used in XML layouts.
+ * Indicator that shows which screen is currently visible.
+
+
+Usage
+=====
+
+This library is very simple to use. It requires no extension of custom classes,
+it's simply added to an activity by calling one of the `MenuDrawer#attach(...)`
+methods.
+
+For more examples on how to use this library, check out the sample app.
+
+
+Left menu
+---------
+```java
+public class SampleActivity extends Activity {
+
+    private MenuDrawer mDrawer;
+
+    @Override
+    protected void onCreate(Bundle state) {
+        super.onCreate(state);
+        mDrawer = MenuDrawer.attach(this);
+        mDrawer.setContentView(R.layout.activity_sample);
+        mDrawer.setMenuView(R.layout.menu_sample);
+    }
+}
+```
+
+
+Right menu
+----------
+```java
+public class SampleActivity extends Activity {
+
+    private MenuDrawer mDrawer;
+
+    @Override
+    protected void onCreate(Bundle state) {
+        super.onCreate(state);
+        mDrawer = MenuDrawer.attach(this, Position.RIGHT);
+        mDrawer.setContentView(R.layout.activity_sample);
+        mDrawer.setMenuView(R.layout.menu_sample);
+    }
+}
+```
+
+
+Credits
+=======
+
+ * Cyril Mottier for his [articles][1] on the pattern
+
+
+License
+=======
+
+    Copyright 2012 Simon Vig Therkildsen
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+
+
+
+
+
+
+ [1]: http://android.cyrilmottier.com/?p=658