Google Materials icons not working on IconicsTextView
I have registered on a customApplication the google material icons:

``` Java
Iconics.registerFont(new GoogleMaterial());
```

And try to use it on a textview:

``` xml
<android.view.IconicsTextView
                        android:id="@+id/next"
                        android:layout_width="48dp"
                        android:layout_height="wrap_content"
                        android:text="{gmd_android}"
                        android:textColor="@android:color/white"
                        android:textSize="16sp"
                        android:contentDescription="Next"/>
```

But the inflater tries to create it throws a null exception.
I have tried with a fontawesome icon and it works (even without it registered on the application)

If I try to use the GoogleMaterial icons through

``` Java
new IconicsDrawable(getActivity(), GoogleMaterial.Icon.gmd_android)
```

it does work.

I don't know what is happening here:

(Using 0.7.9)
