Don't expect that every url specifying a file is a local file url. Instead
let FileInProjectFinder handle urls with other schemes gracefully, too.

Change-Id: I72457d502ff1caf52f588e8ec41ab260882d1cf5
Reviewed-on: http://codereview.qt.nokia.com/1840


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Christiaan Janssen <christiaan.janssen@nokia.com>