1.2.0 (2018-06-08)
  o support heterogeneous variance with new argument 'method' for 'fitSurface'
1.1.3 (2018-05-14)
  o show EC50 in log10 terms for monotherapy summary
  o allow custom compound names for plotting
1.1.2 (2018-05-07)
  o fix monotherapy formula in the vignette
1.1.1 (2018-01-02)
  o added reference to the original article
  o fix DESCRIPTION file according to new R CMD check policy
1.1.0 (2017-09-22)
  o isobologram() plot is now available for ResponseSurface objects
    It is also now included in the shiny app.
  o summary.ResponseSurface does not fail if marginal fits have constraints
  o Change of package maintainer
1.0.3 (2017-08-18)
  o Contour plot for maxR now has correct p-value labels
  o Summary for marginal fits does not fail if Hessian computation failed
1.0.2 (2017-07-31)
  o extra arguments in fitMarginals are now passed to the optimizer functions
1.0.1 (2017-06-29)
  o `predict` method added for the MarginalFit objects
1.0 (2017-06-28)
  o Initial public release
