[Merge] lp:~michael-sheldon/webbrowser-app/7digital-album-download into lp:webbrowser-app

[Olivier Tilloy]

The latest change looks good to me. A couple of questions:

 - What happens to SingleDownload objects when the associated download completes? Are they automatically destroyed? Or are they leaked? (shouldn’t you give the object a parent when instantiating it with createObject(…)?)

 - Is there a good reason for pre-instantiating the next SingleDownload object (i.e., is it a time-consuming operation)? If not, I’d suggest instantiating it on demand only, in the download() function (you’d need to add an optional metadata paramater to the function).
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https://code.launchpad.net/~michael-sheldon/webbrowser-app/7digital-album-download/+merge/237763
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