Submit v0.1.0 to CRAN

[rrrlw]

• make repo public (otherwise URLs in DESCRIPTION will be identified as invalid; also needs to be public for Travis and AppVeyor)
• check if package passes Travis CI (Linux, r-release)
• check if package passes AppVeyor CI (Windows, r-release)
• submit package to win-builder (Windows, r-devel)
• check package locally with R CMD build & check (optional, given checks above)
• create LICENSE (sticking w/ GPL-3?)
• create NEWS.md
• create cran-comments.md
• finish README.md (or README.Rmd)
• submit to CRAN and follow instructions on confirmation email
• accepted by CRAN
• repo release created for v0.1.0
  Edit:
• add repo description and topics (r, cran, r-package, medicare, medicare-data, reimbursement would be good ones)

[rrrlw]

Made a couple changes in e65c28d, we probably need to resolve #5 before resubmitting.