2.2.3

• library(ampvis2) now checks for new github release versions and notifies the user if a new version is available. This does NOT involve the master branch, only releases.
• amp_ordinate():
  • transform="sqrt" wasn't working with nmds/pcoa
  • Adjusted warning messages
  • Added sample_point_size to adjust the sizes of the sample points
  • Removed part of the code that transformed to percentages before ordination. So ordination now more precise, but maybe a bit slower (1 sec)