Dynamicly injected views

Still a work in progress. It's about having the ability to inject views dynamically.

One classic case being, in the backend, you have the page's general layout, headers, footers, scripts everything... and you have a placeholder for the content to be injected:

```html
<div id="content-main">{{dynview "content-main"}}</div>
```

`content-main` can be any template that the client has asked. And it needs to be injected dynamically.

What do you do for those cases?