Adds support for deviantART images in Muzei.

Get muzei here: http://get.muzei.co

The app comes in two modes, one to get the images from the deviantART search, another that gets the images from the daily deviations of the current day.

For the search mode you can put in a search query. The search query works the same as on deviantART itself, so you can use keywords like: favby, by, in, sort:time.

Examples:
favby:spyed - shows all images favorited by spyed.
by:spyed - shows all images made by spyed.
in:photography/nature - shows all images in the category Photography > Animals, Plants & Nature.

For more information on this, check the deviantART FAQ: http://help.deviantart.com/577/