Changes in version 1.0.3 (2023-08-20)                  

  - Cosmetic changes to some man files to resolve erroneous (clashing)
    version numbers
  - Some checks for objects of S3 types were made using string
    comparsions instead of inherits, these have been corrected

                 Changes in version 1.0.2 (2022-04-02)                  

  - Added functions from wBoot by Neil A Weiss into package due to
    archival
  - Due to wBoot incorporation dependency changed to simpleboot
  - Included CLT approximation to be used when larger samples
  - Determination of CLT/bootstrap is carried out automatically- clt
    argument to power.calc can be used to set
  - Change default number of bootstrap re-samples to 9999

                 Changes in version 1.0.1 (2022-01-18)                  

Minor changes

  - Added extra argument start to exposure.levels() to pass the time
    unit in years of study start
  - Corrected bug in time offset of exposure levels when start > 0
  - Changed default plotting label for 25OHD from '25 Hydroxy Vitamin D'
    to '25-hydroxyvitamin D'
  - Added new function 'vitd.curve.2.function' which will convert the
    output of vitd.curve into a list of callable functions (not
    available at user level)

                        Changes in version 1.0.0                        

Major changes

  - Generative model of vitamin D status curves from a squared sine to
    cosine with threshold.
  - Rather than maximum and minimum levels of vitamin D a more flexible
    mean level is now used.
  - Changes to arguments passed to vitd.curves().
  - Cross-over designs have been disabled in current version.
  - Parallel computation is now available for Monte Carlo error
    quantification in pow.calc().
  - Addition of internal function power.calc.0().
  - prop.test() and wilcox.test() used in version 0.1.2 replaced by
    non-parametric bootstrap from wBoot package.
  - Dependency on poisson package removed as it was possible to
    vectorize our own sampling.
  - Updated print and summary function for exposure.levels and
    infection.count objects.
  - Changes to package vignette to document user facing changes.