Changes in Version 1.1.0 (2020-02-24)
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  * Added functionality to calculate and plot estimated marginal means

  * Added permutation test and a plot function to assess observed data under null distribution(s)
  

Changes in Version 1.0.0 (2018-06-26)
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  * Added parameter estimate.type to summary(), removing inconsistency with output from coefs() by defaulting to bootstrap estimates
  

Changes in Version 0.9.9 (2018-04-18)
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  * Renamed some function arguments for consistency, clarity and aesthetic reasons
  
  * Added medication dataset from the accompanied website of Singer & Willett (2003)
  
  * Removed redundant bootstrap estimates from summary.clusbootglm()
  
  * Added and prettified some error handlings
  
  * Changed confint() interval.type argument default to match the one from summary() (BCa interval)