Merge pull request #23 from amccarthy/master

[packaging] Add new Qt DBus dependency to Geoclue plugin package.
[packaging] Remove generated file.
[update] Enhance measurement system support in routing manager.

It is useful to be able to set the measurement system independently of
the locale used by the routing manager. Add accessor functions for the
measurement system to the routing manager classes.

A measurement system property is also added to the RouteModel QML type.
[update] Fix run-time warning when using Geoclue positioning plugin.

The Geoclue plugin requires that the QGeoPositionInfo meta type is
registered.