[Merge] lp:~fboucault/camera-app/location_metadata into lp:camera-app

[Olivier Tilloy]

Before writing the metadata, you should probably do something like that:

    var position = positionSource.position

and then use this variable instead of always referring to positionSource.position (in case it is updated in the meantime, leading to two different positions being used for the metadata of one picture)
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https://code.launchpad.net/~fboucault/camera-app/location_metadata/+merge/227037
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