USPopulationSampler 0.1.1

Changes since initial submission

• Replaced print() and cat() calls with message().
• Updated data-loading functions to use tempdir() as the default download location.
• Updated documentation to reflect the default temporary download location.
• Updated examples and tests to clean up downloaded files from temporary directories using unlink().
• Updated examples to avoid dontrun.
• Improved download handling by downloading files to temporary files before moving them into the cache.

Initial release

• Initial CRAN submission.