[Merge] lp:~cristiklein/update-notifier/use-xdg-folders into lp:update-notifier

[LanoxxthShaddow]

Review: Needs Information
Is there any particular reason why you put the files into XDG_USER_DATA instead of XDG_USER_CONFIG or XDG_USER_CACHE?
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https://code.launchpad.net/~cristiklein/update-notifier/use-xdg-folders/+merge/15038
Your team Ubuntu Core Development Team is requested to review the proposed merge of lp:~cristiklein/update-notifier/use-xdg-folders into lp:update-notifier.