Release 2.5.0

• IMPORTANT: The upcoming 3.0.0 release will be a breaking change for exportRecords. This is needed for full inversion of control to the user over type casting.
• Fully removed deprecated redcapDbConnection
• Added a drop= argument to exportRecords and exportReports. These columns are dropped before returning.
• Metadata is cached in the connection object. In addition to token, url, and config elements, the following are also made available:
  • metadata
  • arms
  • events
  • fieldnames
  • mapping
  • users
  • version
  • projectInformation
    each of these has a companion function
  • has_* (returns a logical indicating if the element has been cached)
  • flush_* (removes the cached value)
  • refresh_* (replaces the cached value with a fresh call to the API)
    There are also flush_all and refresh_all methods.
• New method: exportLogging
• Fixed minor bugs in validations and improved documentation
• Fixed bug in formating vectors for API calls in multiple places #33
• Removed stringr and tidyr as dependencies
• Removed unused version argument from checkbox_suffix
• Fixed error thrown in export_users when labels=TRUE
• Greatly expanded test coverage
• mChoice class addition if Hmisc is installed