Initial sensors backend for WinRT/Windows Phone

This provides the sensor plugin with support for accelerometer,
gyroscope, rotation sensor, orientation sensor, compass, and
ambient light sensor.

Change-Id: Ic91a6cef98e4011858552c5cd6407b494579fe17
Reviewed-by: Thomas McGuire <thomas.mcguire@kdab.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Bump module version to 5.4.0

Change-Id: Icd7c227040671925afa112d353603c16c8e241f4
Reviewed-by: Sergio Ahumada <sahumada@blackberry.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Fix autotests expecting a trailing whitespace for qDebug stream

The behavior of QDebug was fixed in qtbase. Update autotests
accordingly.

Change-Id: Iec8d28f18ca6f5ff1ae960e74d0d978b212ca60b
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Lorn Potter <lorn.potter@jollamobile.com>