Create an updated version of the paper using `dplyr`

[sflippl]

In my opinion, the "Tidy Data" paper is a good resource for R students to learn about the concept. However, this means that they learn about the concept of tidy data with examples using plyr, which has, as far as I know, largely been replaced by dplyr. It seems to me that it would be preferable to introduce the concept of tidy data and the tools for its transformation in the same paper. Now, they learn about the plyr functions while reading the paper and then have to learn about dplyr afterwards. I therefore think that an updated version of the paper would make sense for these purposes.

This is certainly not an important issue but I do feel like it would make an introduction to R more efficient. As I realize that this is probably not a priority for you, I would be happy to create such an updated version. If you have concerns, I am, of course, happy to drop the issue, as well.