v0.3.13

Enhancements

• Uses https by default to download packages (see https://www.r-consortium.org/news/blogs/2015/08/best-practices-using-r-securely).
• New features of the checkpoint package:
  • Defaults to https://mran.revolutionanalytics.com/snapshot by default in R versions 3.2.0 and later, if https support is enabled.
  • User modifiable MRAN default URL. To change the URL, use options(checkpoint.mranUrl = ...)