v0.9.7

CategoricalArrays v0.9.7

Diff since v0.9.6

Closed issues:

• Integration with Plots.jl (#256)
• Generic test for allowing to use isless (#319)
• Request to implement refcode in a 0.9.* patch. (#347)

Merged pull requests:

• Add RecipesBase plotting recipe (#340) (@nalimilan)
• Allow adding new levels to ordered arrays (#342) (@nalimilan)
• Add CategoricalValue(x, source) and disallow mixed isless and < (#346) (@nalimilan)
• Add refcode, deprecate level (#348) (@nalimilan)