New version number 0.6.0 and some fixes:

* moved on to version 0.6.0
* fixed youtube url sicnature encryption (vevo videos can be watched again)
* removed play action from the ActionBar
* rolled back changes for hiding the InfoBar inside PlayVideoActivity
* some small layout changes
* removed some files to be ignored (mostly inside .idea directory)
* etc

app/src/main/res/layout/fragment_videoitem_detail.xml

@@ -214,7 +214,7 @@
     <android.support.design.widget.FloatingActionButton
         android:id="@+id/playVideoButton"
         android:layout_alignParentBottom="true"
-        android:layout_alignParentRight="true"
+        android:layout_centerHorizontal="true"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         app:backgroundTint="@color/primaryColorYoutube"