Rename fletch -> dartino

samples/github/android/GithubSample/app/src/main/res/layout/activity_main.xml

 <!-- A DrawerLayout is intended to be used as the top-level content view using match_parent for both width and height to consume the full space available. -->
 <android.support.v4.widget.DrawerLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/drawer_layout"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context=".MainActivity">
 
     <!-- As the main content view, the view below consumes the entire
          space available using match_parent in both dimensions. -->
     <FrameLayout
         android:id="@+id/container"
         android:layout_width="match_parent"
         android:layout_height="match_parent"/>
 
     <!-- android:layout_gravity="start" tells DrawerLayout to treat
          this as a sliding drawer on the left side for left-to-right
          languages and on the right side for right-to-left languages.
          If you're not building against API 17 or higher, use
          android:layout_gravity="left" instead. -->
     <!-- The drawer is given a fixed width in dp and extends the full height of
          the container. -->
     <fragment android:id="@+id/navigation_drawer"
               android:layout_width="@dimen/navigation_drawer_width"
               android:layout_height="match_parent"
               android:layout_gravity="start"
-              android:name="com.google.fletch.githubsample.NavigationDrawerFragment"
+              android:name="com.google.dartino.githubsample.NavigationDrawerFragment"
               tools:layout="@layout/fragment_navigation_drawer"/>
 
 </android.support.v4.widget.DrawerLayout>