Doc: Improved example documentation.

-added information about running the example (using \include)
-updated copyright year
-added link to relevant pages

Task-number: QTBUG-33597
Change-Id: I58885677f365b31ad40b999b1c0d6acb491d31df
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>