NEWS for sure package

Changes for version 0.2.0

• New function surrogate for returning the surrogate response values used in calculating the surrogate-based residuals. The surrogate response values can be useful for checking the proportionality assumption of fitted cumulative link models, among other things.
• Jittering (on both the probability scale and the response scale) is now available for fitted cumulative link models based on packages MASS, ordinal, rms, and VGAM (#18).
• Added support for vector generalized additive models from the VGAM package (i.e., objects of class "vgam").
• New data sets df4 and df5 for illustrating various uses of the surrogate residual for diagnostics an ordinal regression models.

Changes for version 0.1.2

• Initial release.