Custom font causes app to crash
I am able to create images just fine here through the IconicsDrawable. But if I try to use the IconicsTextView in the layout, it crashes with a custom font.

```
            <com.mikepenz.iconics.view.IconicsTextView
                android:id="@+id/text_icon"
                android:text="{font-myglyph}"
                android:textColor="@android:color/black"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="20sp" />
```

Now, if I use faw or gmd it works fine.

I register my new font in Application

```
        Iconics.registerFont(new MyCustomFont());
```
