updated readme

Merge pull request #197 from achael/dev

merge dev into main for v1.2.9

Merge pull request #183 from achael/dev

modified README

Merge pull request #182 from achael/dev

fixed minor issue in image.display()

Merge pull request #181 from achael/dev

merge dev for 1.2.8

Merge pull request #174 from achael/dev

version 1.2.7

Merge pull request #171 from achael/dev

merged dev into main for v1.2.6

Merge pull request #154 from achael/dev

Merged dev into main for version 1.2.5

Merge pull request #153 from achael/dev

merged dev into main for 1.2.4

Merge pull request #142 from achael/dev

merge dev into main 10/29/21