Quick: Fix handling of multiple certificate errors per request

This patch enables Quick API to handle multiple certificate errors per
requests and update the example projects. Chromium 40 branch raise an
certificate error for every resource loaded in a request (.js, .css, .html)
instead of only one (previous behavior), so requests with more than one
certificate error were automatically rejected.

Change-Id: Ibaa3027cd6e7f22b5dc51dcd52f76ccf5ea162d3
Reviewed-by: Pierre Rossi <pierre.rossi@theqtcompany.com>