IconicsImageView from XML layout not loading in app
Hi Mike,

I've been trying to use your icons within my XML layouts. The icons work fine whenever I use them programmatically however they're not appearing in XML layouts. I've tried looking at the follow issues to see if there was a solution and none of them helped me in my case: https://github.com/mikepenz/Android-Iconics/issues/67 and https://github.com/mikepenz/Android-Iconics/issues/74

```
<com.mikepenz.iconics.view.IconicsImageView
                android:layout_width="40dp"
                android:layout_height="40dp"
                app:iiv_icon="gmd-home"/>
```

This is my gradle file

```
 compile('com.mikepenz:materialdrawer:5.1.9@aar') {
        transitive = true
    }
 compile 'com.mikepenz:google-material-typeface:2.2.0.1.original@aar' // Google Material Icons
```

I also tried adding what was suggested in this post to my proguard-rules.pro file but it didn't work
https://github.com/mikepenz/Android-Iconics/issues/67#issuecomment-131595331
