Add amplify icon and support for scheme_amplify card property

[jordanweiler]

We'll need to add the amplify icon to the codebase since it doesn't exist yet. We should be able to render the icon in text via [amplify].

We need to also support a new scheme_amplify property on card data. It should behave similarly to scheme_acceleration, scheme_crisis, and scheme_hazard. This property should display the amplify icon when rendered.

[mmougy]

apparently marvel-icons.ttf does not contain the amplify icon

does it exist a newer version of marvel-icons.ttf?