imbo/imbo — pull request #286 by christeredvartsen (2014-03-26 14:18:58+00:00)
Title: Save image/x-jpeg, image/x-png and image/x-gif as image/jpeg, image/png and image/gif

Images with the following mime types:

* `image/x-jpeg`
* `image/x-png`
* `image/x-gif`

should be saved as:

* `image/jpeg`
* `image/png`
* `image/gif`