This helps maintaining the doc dependencies.

All Qt WebEngine module docs are now generated in the
/qtbase/doc/qtwebengine/ folder.

Note that you must run qmake -r for the docs to be generated
correctly after applying this patch.

Add Qt WebEngine C++ Classes page that lists the C++ classes
for the submodules.

Modify snippet and example paths accordingly.

Change-Id: I59431c5f766f30b59654ca4e2219b76c79137225
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>

Qt copyrights are now in The Qt Company, so we could update the source
code headers accordingly. In the same go we should also fix the links to
point to qt.io.

Change-Id: Ieb6bac7a1be5c25eb7cb917495b58b6a870ca6d4
Reviewed-by: Pierre Rossi <pierre.rossi@theqtcompany.com>

    - Add documentation for Quick Nano Browser
    - Add all examples to the correct group
    - Add instructions to run the examples
    - Qt WebEngine Widgets index page: Add examples section

Task-number: QTBUG-42668
Change-Id: Ie60f8708336b9c147d0c22afb555fe87287deddc
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>
Reviewed-by: Venugopal Shivashankar <venugopal.shivashankar@digia.com>