[Feature Request] Template fields

[Azurewren]

Is it possible, or, could it please be added that the File Content 'template text' field can be used to insert fields such as {{date}} or {{url}} or {{title}}?

That way we can customise the headers or footers of our saved page. e.g.

---
Date Saved:: {{date}}
Source URL:: {{url}}
Page Title:: {{title}}
---