How do you add to the queue via template?

rendering a flash message via template would allow for unlimited and safe flexibility, as it would allow you to skip the service, and safely render links, not relying on htmlsafe, etc.

I noticed the README has no examples of this? can one be added?

------------

I'm assuming _somewhere_ in the app, there is a
```hbs
{{#each fms.queue as |foo|}}
some kind of rendering
{{/each}}
```

but then _elsewhere_, I'd like to be able to
```hbs

My custom content

```
and have this usage add to the queue, display, and do all the timeout-y stuff that folks would expect from using the service directly.