Remove the widgetsnanobrowser example

This example hasn't been touched since we imported QtWebKit examples.
If we need to have a more test-purpose widgets browser in the future,
we can dig it back from the history.

Change-Id: Icee9bd7f09827a97b33c6783b87311e331d963b1
Reviewed-by: Pierre Rossi <pierre.rossi@gmail.com>
Rename example directories to match the source install destination

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>
Uncomment the binary install of the fancybrowser example

Its sources are going to be installed and the binary should end up at the same
place.

Change-Id: Iad7c732ba9f49cb0f02eb2c10b797298034ef38d
Reviewed-by: Pierre Rossi <pierre.rossi@gmail.com>
Fork the quicknanobrowser as tests/quicktestbrowser

This also removed experimental API uses from the quicknanobrowser example,
which should be used mainly for documentation purposes.

The quicktestbrowser should be the one that we use from now on as a raw testbed
of new APIs.

As with other targets in the tests directory, it will only be built by default
if Qt is configured with -developer-build (and without -nomake tests).

Change-Id: Ib4461c898cd3227bbb810493daac4d841d0d8f3e
Reviewed-by: Pierre Rossi <pierre.rossi@gmail.com>
Update .gitignore

Adapt to the move of out/(Debug|Release) to src/core/(Debug|Release)
This also changes individual tests binary rules into a tst_* rule
and a negating tst_*.* to unmatched non target binaries.

Move more general file globs at the end of the list so that the
negation doesn't also negate those general rules (e.g. *.o).

Change-Id: Ie953da6cf255adfee7d4b04e91a6528558918ebc
Reviewed-by: Pierre Rossi <pierre.rossi@gmail.com>