switched to library project namespace

Views/ColorMixer/res/layout/main.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-  xmlns:mixer="http://schemas.android.com/apk/res/com.commonsware.android.colormixer"
+  xmlns:mixer="http://schemas.android.com/apk/res-auto"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:orientation="vertical"