dcmdata 0.2.0

• Added new data from the Pathways for Instructionally Embedded Assessment (PIE)
  project: pie_ft_data, pie_ft_qmatrix, pie_pilot_data,
  pie_pilot_qmatrix.

• Added new data sets from the Item Response Warehouse.

  • Fraction subtraction: fraction_data, fraction_qmatrix.
  • MCMI-III: mcmi_data, mcmi_qmatrix.
  • ROAR-PA: roarpa_data, roarpa_qmatrix.
  • TIMSS (2003): timss03_data, timss03_qmatrix.
  • TIMSS (2007): timss07_data, timss07_skill_qmatrix, timss07_topic_qmatrix, timss07_domain_qmatrix.

• Added a NEWS.md file to track changes to the package.