The build instructions are not that interesting, it's a toss-up
between CC0 and BSD-2, but because other CMake bits are BSD-2-Clause,
apply that to more CMakeLists. The copyright date isn't all that
accurate, but these are just inconsequential files.
While here, tidy up and get rid of some useless intermediates.
it is no longer maintained upstream
this change is tested with QtWebEngine 5.6.0, it builds and runs
displays the webview page correctly, clicking next however does not refresh that new page completely
