reproresearchR 0.1.0

• Initial CRAN release.
• Added three teaching datasets used throughout the textbook:
  • pizza_prices
  • exam_data
  • infection_treatments
• Added chapter_script() to copy or run chapter scripts shipped with the package.
• Added list_chapters() to list available chapter scripts included in the package.
• Designed as a companion package to the open educational resource textbook Reproducible Research Using R.