QtQuick and QtQml modules need Shiboken to support circular dependencies

Various methods in QtQml require QtQuick types, and QtQuick needs some QtQml types, resulting in a circular dependency. Right now the typesystem file for QtQuick loads the typesystem for QtQml, but you can't load the QtQuick typesystem in QtQml at the same time as you'll get an error. This results in not all of the features in the QtQml module being available to Python.