Qt metrics v1.0: Prepare for launch

Removed pilot references as a preparation for launch:
- Pilot text and non-working sample menu items removed from header
- Pilot text and info replaced with link to wiki page in footer
- Qt project link added to header

Change-Id: Ia95725fd491c7808a6a19c406b12e1dd08a6c87d
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>