Custom XML error with Android Build Tools (0.4.2) -- No resource identifier found for attribute 'gapWidth' in package 'xxx.xxxx.'
<p>Updated to the latest Android Build tools (0.4.2) and ran into the following when attempting to assemble:</p>

<p>/AndroidApp/App/build/res/all/flavor/debug/layout/fragment.xml:84:
error: No resource identifier found for attribute 'gapWidth' in package 'com.viewpagerindicator'</p>

<p><code>RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/build/res/com.viewpagerindicator"
    android:layout_width="match_parent"
    android:layout_height="match_parent" &gt;</code></p>
