Minor CRAN comments

• If there are references describing the methods in your package, please add these in the description field of your DESCRIPTION file in the form
• \dontrun{} should only be used if the example really cannot be executed (e.g. because of missing additional software, missing API keys, ...) by the user. That's why wrapping examples in \dontrun{} adds the comment ("# Not run:") as a warning for the user. Does not seem necessary. Please unwrap the examples if they are executable in < 5 sec, or replace \dontrun{} with \donttest{}.
• Please ensure that you do not use more than 2 cores in your examples, vignettes, etc.