Make the print preview configurable

Update the print preview template to allow hiding some parts of the XWiki UI:

• Breadcrumb
• Tags
• Comments (optional maybe) + comment button
• Page title (optional)
• Last modified by/Created by lines (optional)

No UI included for the options, just query string parameters. Also, it would be nice to make the print preview more consistent with the (server-side) PDF export by adding support for PDF export options (e.g. be able to have a table of contents page in print preview).