Changed version info for minor release

Preparing version numbers for 0.23.0 release

bumping version number

Update CHANGELOG.md

Changed version information for essential EEPR

Peparing for Easter release (local mode)

Preparing for release 0.21.0

Updating files for release 0.20.1

Adding some sample summary plots

Preparing for v0.19.1 release. Accepting genome files in gz format as…

… well