Remove 'sort_by' in favor of R/data.table sort_by

Add method 'rows.etable'

Fix serious bug with '%to%' in the multiassignment expression in the …

…'let'

Update date in NEWS

Minor fix in 'vlookup' for case when variable 'ind' exists in the 'di…

…ct' data.frame

Fix typo in README/Vignette

Fix 'to_df' for list of unnamed vectors argument

Release on CRAN

Minor changes in vignette and README

Vignettes