Third release after manuscript review for Zenodo archiving

New release because the repository was not active on Zenodo with the second release.

Second release after manuscript review for Zenodo archiving

This release is comprises the moving of the scripts from dr-funk github https://github.com/dr-funk/trapped-RdRp to the EPIV github and updating the slidingfold script to display sequences outside the hemagglutinin cleavage site.