version 0.0.0.9013 2017-03-16
  * new object class 'coverconvet'
  * methods for 'coverconvert'
  * function 'transform' to convert cover codes into percentage

version 0.0.0.9014 2017-03-19
  * new validation rule: duplicated combinations 'name + author' are not allowed
  * data 'Easplist' modified to fulfil the last rule
  * new method 'as.list'

version 0.1.0 2017-06-14
  * version prepared for CRAN

version 0.1.1 2017-06-29
  * vignette 'taxlist-intro'
  * package 'vegdata' moved from Depends to Imports
  * function 'df2taxlist' adapted to species lists with duplicated names
  * arguments 'keep_parents' and 'keep_children' implemented in 'subset'
  