Compile Rmd file using knitr

Great tool! Thanks for creating this. I am a long-time macvim user just moving over to SE2. Your Rtools package is making the transition a lot smoother for me.

I'd luv to be able to compile Rmd files as well. The following works on mac as a 'build-system'. Issue is it opens a new tab/browser each time you recompile. Is this still something you are working on?

"cmd": ["osascript", "-e", "tell app \"R64\" to cmd \"file <- '$file'; knit2html(file); browseURL(sub('.Rmd','.html',basename(file)))\"\n"]