title: Button BackgroundTint not working with AppCompat v23
body: <p>I'm trying to use AppCompat v23 so that I have full Button coloring using BackgroundTint.</p>
  
  <p>I have added <code>compile 'com.android.support:appcompat-v7:23.0.+'</code> to my app's build.gradle file.</p>
  
  <p>I have my app theme set with <code>android:theme="@style/AppTheme"</code> in AndroidManifest.xml</p>
  
  <p>In styles.xml I have:</p>
  
  <pre><code>&lt;resources&gt;
      &lt;!-- Base application theme. --&gt;
      &lt;style name="AppTheme" parent="Theme.AppCompat.Light"&gt;
          &lt;!-- Customize your theme here. --&gt;
      &lt;/style&gt;
  &lt;/resources&gt;
  </code></pre>
  
  <p>I'm not trying to override anything, I'm just trying to get the base theme to work.</p>
  
  <p>I am using <code>public class LandingActivity extends AppCompatActivity</code> in my main activity declaration.</p>
  
  <p>Finally, within the layout I have <code>android:backgroundTint</code> on a Button to set a color in colors.xml.</p>
  
  <p>On a device running 5.0 the colors work perfectly.  On 4.0 devices there is no coloring on the buttons.  It's the default grey.</p>
  
  <p>I'm sure that I'm missing something, but I have no idea what it is.  <strong>Are there any other steps that I need to take to allow the AppCompat library to work its magic?</strong></p>