0.99.28.0.1

2020-01-20:

• Remove redundant "as.data.set" method and setOldClass() call for "tbl_df"

2020-01-17:

• Make copying of labels while recoding work again.
• Make recode() warn about NAs being created.
• Add a new optional '.default' and '.complete' arguments to cases().

2020-01-16:

• Added functions reorder_codes() and trim_labels().