Update with new how-to (AWS s3 buckets)

README.md

@@ -11,6 +11,7 @@ This repo does three things:
    * how to use R/RStudio on the University [SVE (remote desktop) service](howTo/sve.md)
    * where to [keep your data](howTo/keepingData.md)
    * how to use [renv](howTo/renv.md) to manage your R environment - including packages
+   * how to access Amazon Web Services S3 buckets directly from R using [aws.s3](howTo/aws-s3.md)
  * it is a [template](repoAsATemplate.md) repo that illustrates how we work and which you can copy;
  * it is an R package. This means:
      * package functions are kept in /R