R bindings: now using roxygen2 for saner documentation
PTFM-6103: Now including the certificates file as part of the package and using it in curl requests; also fixed typo in error reporting
Moving certificate file to where it should be (data is a special directory)
R: removing date from auto-generated DESCRIPTION, etc.
R: Removing DESCRIPTION from template process; leaving dxR-package.R as is (but with a comment pointing out where to edit it first)
Getting rid of some typo comments