Add @jimhester to contributors page

02_contributors.Rmd

@@ -9,5 +9,6 @@ The development and delivery of this material has benefited greatly from contrib
   * Dean Attali ([blog](http://deanattali.com), [GitHub](https://github.com/daattali/), [twitter](https://twitter.com/daattali)) who earned his M.Sc. Bioinformatics at UBC. He's the developer of the [shinyjs](https://github.com/daattali/shinyjs) package and [much more](http://deanattali.com/projects/).
   * Bernhard Konrad ([GitHub](https://github.com/BernhardKonrad), [twitter](https://twitter.com/bernhardkonrad)) earned his Ph.D. in Applied Math at UBC, completed an [Insight Data Science Fellowship](http://www.insightdatascience.com), and is a software engineer at Google.
   * Shaun Jackman ([GitHub](https://github.com/sjackman), [twitter](https://twitter.com/sjackman), [sjackman.ca](http://sjackman.ca)) is a Ph.D. student in bioinformatics at UBC, the lead developer of [Linuxbrew](http://linuxbrew.sh) and a developer of [Homebrew-Science](https://github.com/Homebrew/homebrew-science) and the genome sequence assembly software [ABySS](https://github.com/bcgsc/abyss)
+  * Jim Hester ([GitHub](https://github.com/jimhester), [twitter](https://twitter.com/jimhester_), [jimhester.com](https://www.jimhester.com)) is a Software Engineer at [RStudio](https://www.rstudio.com).
   * The [STAT 545 TA group](http://stat545.com/people.html)
   * A growing number of [GitHub contributors](https://github.com/jennybc/happy-git-with-r/graphs/contributors)