jrt 1.1.0

Fixes for compatibility with recent versions of the mirt package.
Fixes for compatibility with recent versions of the ggplot2 package.
Update package citation.
Added documentation of S4 classes/methods.
Added the possibility to override the automatic facet naming in jcc.plot() with argument facet.names.
Added the possibility to change the opacity of the different category lines in jcc.plot() with line.opacity.
Simplified messages for situations with judges/items with unobserved categories.
Made Akaike Information Criterion (AIC) the default option in model comparisons.

jrt 1.0.1

Simulated dataset is now directly included as jrt::ratings.
Model weights (often called Akaike weights) are now presented in the model selection output (per reviewer suggestion).
Calls to mirt can now be showed with show.calls = TRUE argument in the jrt()function.
References were updated.