[Merge] lp:~penk/gallery-app/sdcard into lp:gallery-app

[Arthur Mello]

Review: Needs Fixing

If this is still wanted, we could add the path to the sdcard to the list of monitored directories and gallery will automatically scan all the sub folders of it and add the media files found.
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https://code.launchpad.net/~penk/gallery-app/sdcard/+merge/231587
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