Feature requests for knitr reports.

[wlandau]

Maybe I'm missing something here, but it would be nice if remake went through the code chunks of a knitr report like report.Rmd and automatically detected dependencies. This would include intermediate objects like processed in your example and any user-defined functions. On the other hand, it seems like a lot of work for a small gain, so I don't know if it would be worth the trouble. It would also be nice to be able to tell remake to call rmarkdown::render just by specifying report.html (or report.pdf, etc.) instead of report.md.