To match other modules example directory structures we should deploy our
examples in a directory matching the module name, webengine and
webenginewidgets in our case.

qmake uses the relative directory of each example up to the upper "examples"
directory to decide where they will be deployed when running the sources
install target.

Change-Id: I59ce7ff8a30f98fad20064c7eecf72b784f1d275
Reviewed-by: Pierre Rossi <pierre.rossi@gmail.com>

This allows handling calls that would be signaled by QNetworkAccessManager
in QtWebKit.
This pulls QtNetwork as a dependency of the QtWebEngineWidgets module
to be able to use QAuthenticator, but isn't required otherwise.

Only the request URL is available in the case of HTTP authentication
(no access to HTTP request headers that the QNetworkReply would allow)
and only the proxy host name in the case case of proxy authentication.

This keeps the API synchronous the same way, as QtWebKit did, in
favor of source compatibility at the cost of requiring a modal
dialog, even though the implementation doesn't require it.

Change-Id: I9e021def38e6107c9e66d2de8f86bd0328d543df
Reviewed-by: Michael Bruning <michael.bruning@digia.com>

Import the sources as-is, without adding it to the build, to allow
performing diffs later on the changes that were needed to port it
to use QtWebEngine and manage source compatibility issues.

Change-Id: Icf8a284881ce2153e9b5a1ba97dbe77096f1b88d
Reviewed-by: Andras Becsi <andras.becsi@digia.com>