Cook codebooks from survey metadata encoded in attributes in R

codebook 0.7.4 Additions

• Function new_codebook_rmd creates a new file in your working directory with a codebook template.
• Function metadata can be used to set dataset-level metadata before rendering a codebook (valid attributes will carry over to JSON-LD representation)
• Compliance with Google Dataset Search, see examples

• removed zap_label because haven 2.0.0 has this function
• added several functions to add JSON-LD compliant metadata and to show it in the codebook
• removed some non-standard attributes from the JSON-LD metadata so that datasets will be indexed in Google Dataset Search
• work with haven 2.0.0's changed class names
• play nice with userfriendlyscience::makeScales attributes
• improved binning and wrapping in plot_labelled
• removed the mice dependency to reduce the number of dependencies

• detect_missing reset variable label with the new haven version (only between 0.6.3.9000 and 0.7.0, never on CRAN)
• reverse_labelled_values mislabelled values, if there were labelled missing values (numbers were correct)