Added about dialog

- about dialog
- changed old dev tag „karim23697“ to „kabouzeid“

app/src/main/res/menu/drawer.xml

@@ -28,4 +28,10 @@
         android:orderInCategory="100"
         android:title="@string/action_settings"
         app:showAsAction="never"/>
+
+    <item
+        android:id="@+id/action_about"
+        android:orderInCategory="101"
+        android:title="@string/action_about"
+        app:showAsAction="never"/>
 </menu>

app/src/main/res/values/strings.xml

@@ -5,6 +5,7 @@
     <string name="navigation_drawer_open">Open navigation drawer</string>
     <string name="navigation_drawer_close">Close navigation drawer</string>
     <string name="action_settings">Settings</string>
+    <string name="action_about">About</string>
     <string name="action_current_playing">Current playing</string>
     <string name="action_playing_queue">Playing queue</string>
     <string name="action_search">Search</string>
@@ -62,5 +63,7 @@
     <string name="label_current_playing_queue">Playing queue</string>
     <string name="close">Close</string>
     <string name="save_as_playlist">Save as playlist</string>
+    <string name="credits">Material Music is a completely free material designed music player by <b>Karim Abou Zeid</b>.\n\n<a href="https://plus.google.com/+KarimAbouZeid23697">Google+</a>&#160;&#160;&#160;<a href="https://twitter.com/karim23697">Twitter</a></string>
+
 
 </resources>

app/src/main/res/values/values.xml

@@ -5,5 +5,5 @@
     <string name="transition_album_text">album_text_transition</string>
     <string name="transition_artist_image">artist_image_transition</string>
     <string name="transition_artist_text">artist_text_transition</string>
-    <string name="DEV_TAG">karim23697</string>
+    <string name="DEV_TAG">kabouzeid</string>
 </resources>