mmequiv 1.0.0

• calculate_mme.data.frame() and calculate_mme.tbl_df() now allow users
  to specify use_api and includes informative warnings about the API
  rate limit

• Deprecated calculate_mme_df() and refactored calculate_mme() to
  use S3 methods for list, data.frame, and tbl_df objects (#4)

• Deprecated calculate_mme_local() and consolidated local calculation
  functionality under calculate_mme() with new use_api argument (#3)

• Fixed calculate_mme_df() bug in error catching logic and removed hard
  dependency on tibble package

• Updated DESCRIPTION in response to CRAN reviewer suggestion for next
  submission