Changes in version 0.4.4                        

  - Add function read_epp_workset_options() to read ANC prevalence
    adjustment and EPP-ASM model option selections in EPP Curve Fitting
    page.
  - Update read_epp_data() to read household survey ART coverage inputs.

                        Changes in version 0.4.3                        

  - Add function read_eppxml_results() to read projection outputs from
    EPP .xml file including ART coverage.

                        Changes in version 0.4.2                        

  - Add type.convert(..., as.is = TRUE) to silence R 4.1 warning.

                        Changes in version 0.4.1                        

  - Handle new data structure for household survey data introduced in
    EPP 2019.

                        Changes in version 0.4.0                        

  - Update EPP .xml file parsers to use xml2 package instead of XML
    package. Improved logic and efficiency for parsers.
  - Search XML node trees rather than rely on node position. More robust
    and code now works to read data from concentrated epidemic
    structured EPP files
  - Parse subpopulation characteristics and turnover from concentrated
    epidemic files.
  - Read incidence data inputs.

                        Changes in version 0.3.3                        

  - Only read ANC-RT data if used in EPP fit

                        Changes in version 0.3.2                        

  - ~~IMIS offsets likelihood by maximum log-likelihood to avoid
    underflow.~~ Rolled this back because it introduced a pernicious
    little bug in mixture weights when offset changes numerical
    underflow. Should be re-implemented more carefully later.
  - Added option to likelihood() to return log values.

                        Changes in version 0.3.1                        

  - Updates to IMIS optimization step:
  - Do random sample as well in each iteration
  - Reduce numerical integration stepsize and try again if BFGS
    encounters non-finite difference error
  - Use last value from center_all to initialise optimization if no
    positive samples remain

                         Changes in version 0.3                         

  - Implement ANC routine testing (ANC-RT) likelihood in EPP 2017
    (Spectrum 5.52)