[Question] Isn't the ico_size working on xml's IconicsButton?
I am trying to set button size and round shape by this layout
```
<!-- "\n" it for making the icon on top-->
<com.mikepenz.iconics.view.IconicsButton
        android:text="{gmd-replay}\nRetry"  
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/round_btn"
        app:ico_size="100dp"
        />
```
the ico_size is not working, and if there is an option i don't know in `Android-Iconics Library` make round shape I appreatiat if you have mentioned it

Thank you, for a great library and a great responding to its users till now

