Fix QtLocation QML API and its version.

Despite missing QtLocation 5.3 release we will fix the QML Location
API as of 5.3 release time. This does not affect the C++ API.

We keep the 5.0 version tag but 5.3 becomes the defacto standard.

Change-Id: I93838a97a01c8b886a86e8b2bab3dedc595a2ee6
Reviewed-by: Aaron McCarthy <mccarthy.aaron@gmail.com>
Bump all qml code to QtLocation 5.3

It is the baseline for all subsequent additions.

Change-Id: Ia56da45b8b92dd0224dbeff97976cd06aa25d943
Reviewed-by: Aaron McCarthy <mccarthy.aaron@gmail.com>