This function setups the package to use the distops package.
It first creates the DESCRIPTION file adding the Rcpp and
RcppParallel packages to both the Imports: and LinkingTo: fields
and the distops package to the LinkingTo: field. It also adds the
SystemRequirements: GNU make field. It then creates the NAMESPACE file
adding the importFrom() directives for the Rcpp and RcppParallel
packages and the useDynLib() directive for packages with compiled code.
It finally creates the src/Makevars and src/Makevars.win files with the
appropriate compilation flags.