* Add QtVersionNumber::matches to match against a Qt version to
  make the code setting the features easier to follow.
* Use versionedFeatures instead of adding new string constants for
  the latest and greatest Qt Quick and Qt Quick Controls.
* Fix Qt-version-to-features mapping as discussed in
  QTCREATORBUG-14575
* Simplify code in qmljsbundleprovider.cpp: It should do the same
  thing as the old one.

Change-Id: Iba24e9d299a2a2e5d6e4de7cd1e95707a574678e
Reviewed-by: Daniel Teske <daniel.teske@theqtcompany.com>