QmlJS highlighting: Use semantics for types and binding names.

This fixes some problems with highlighting like anchors {}, allows us
to only highlight correct types and to make the binding name formatting
customizable.

Change-Id: I7ab0c0ed384108b74a2998796d868d5ced4a5310
Reviewed-on: http://codereview.qt-project.org/4669


Reviewed-by: Thomas Hartmann <Thomas.Hartmann@nokia.com>