How can i create an IconicsButton as external layout and import it into another one with include @layout?
Hi,
it's possibile to define a `<com.mikepenz.iconics.view.IconicsButton` as external layout and include it into another one in this way?

``` xml
<include 
            layout="@layout/layoutname
            android:id="@+id/myid"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:contentDescription="@string/mycontent"
            android:text="{faw-user-plus}"
            android:textAllCaps="false"
            android:textSize="26sp"
 >
```

and into layoutname.xml i have this:

``` xml
<?xml version="1.0" encoding="utf-8"?>
    <com.mikepenz.iconics.view.IconicsButton
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="@color/white_main"/>
```

With this code, the result is a Button without the "{faw-user-plus}" text.
