Issue while adding dateslider
<p>I am trying to use the dateslider available at <a href="http://code.google.com/p/android-dateslider/" rel="nofollow">http://code.google.com/p/android-dateslider/</a> to my android project. However I am having some issues with it </p>

<p>Here is a layout file called datetimeslider.xml</p>

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;com.googlecode.android.widgets.DateSlider.SliderContainer
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res/com.googlecode.android.widgets.DateSlider"
    android:id="@+id/dateSliderContainer"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"&gt;
    &lt;com.googlecode.android.widgets.DateSlider.ScrollLayout
        style="@style/Scroller"
        app:labelerClass="com.googlecode.android.widgets.DateSlider.labeler.MonthYearLabeler"
        app:labelerFormat="%tb %tY"
        app:childWidth="180dp"/&gt;
    &lt;com.googlecode.android.widgets.DateSlider.ScrollLayout
        style="@style/Scroller"
        app:labelerClass="com.googlecode.android.widgets.DateSlider.labeler.DayDateLabeler"
        app:labelerFormat="%td %ta"
        app:childWidth="120dp"/&gt;
    &lt;com.googlecode.android.widgets.DateSlider.ScrollLayout
        style="@style/Scroller"
        app:labelerClass="com.googlecode.android.widgets.DateSlider.labeler.TimeLabeler"
        app:labelerFormat="%tR"
        app:childWidth="80dp"/&gt;
    &lt;include layout="@layout/dialogbuttons"/&gt;
&lt;/com.googlecode.android.widgets.DateSlider.SliderContainer&gt;
</code></pre>

<p>However, it doesn't recognized the namespace available at </p>

<pre><code>xmlns:app="http://schemas.android.com/apk/res/com.googlecode.android.widgets.DateSlider
</code></pre>

<p>all the attributes 
like </p>

<pre><code>app:labelerFormat="%tb %tY"
app:childWidth="180dp"
</code></pre>

<p>they are not recognized by android. Why is it so?</p>
