Add the ability to make report templates.

```
Requested by Benjamin in the forum post
http://www.sqlpower.ca/forum/posts/list/2371.page#5078.
Report templates should be creatable to allow using the same header,
footer, and layout repeatedly.

```

Original issue reported on code.google.com by `ThomasOB...@gmail.com` on 17 Jun 2009 at 4:24
