Remove config option "code_archive_uri", replace with the ability to add a URL in the code_archive setting
Use an actual timestamp for the current directory, rather than simply "timestamp"
Change "latest" symlink to "current" and remove current_symlink as an option. Its the charms business, not yours. There will long longer be a "latest" symlink, as timestamped directories will make it obvious which is latest.
app_label now defaults to unit name, so it doesnt need setting in playbook.yaml
Remove files from repository and add them from a link instead
Move configuration to config.yaml
Update README