add simple README.md

Author: eddelbuettel

README.md

@@ -0,0 +1,10 @@
+
+## ESS Intro Website
+
+This repo serves as the [default website for the
+'ess-intro'](https://ess-intro.github.io/) organization focussed on providing
+a few introductory video and slide presentation for [Emacs Speaks
+Statistics](https://ess.r-project.org/).
+
+To modify the page, edit the file `index.Rmd` and run `make` (or call
+`rmarkdown::render()` manually).