The QtMultimedia module should have version 5.0 to align with
Qt 5 in general. This change updates the version, but keeps
4.0 versions of the elements for compatability purposes.
Documentation and examples has also been updated to reflect
this version change.
Change-Id: Ica10c1a5ecc2c7233192a65e04ff77eb33a77e30
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>