Art direction use case description should be more than cropping

[grigs]

The current description for art direction says:

In a responsive design, it is typical to change the crop of an image so it can be targeted towards the features of a particular display (or set of displays)

The Nokia example shown later demonstrates that sometimes the changes aren’t simply cropping.

Perhaps we could change it to say something like:

“In a responsive design, it is typical to change an image so it can be targeted towards the features of a particular display (or set of displays). Sometimes this means cropping an image. Other times, it can mean a new form of an image that may have different proportions or may be changed in other ways to match changes in the layout.”

[yoavweiss]

@marcoscaceres the change doesn't show up at http://usecases.responsiveimages.org/. Did I modify the wrong branch?

[anselmh]

Think it has to be merged manually to show up on website.