Yeti 0.8.0

What's Changed

• Add project_summary for a progress overview by @macorifice in #26
• Round-trip user stories through CSV by @macorifice in #27
• Add list_stories and a confirmed delete_project by @macorifice in #28
• Add update_user_story and list_flows by @macorifice in #29
• Add delete_flow to remove a saved diagram by @macorifice in #30
• Release 0.8.0 by @macorifice in #31

Full Changelog: v0.7.0...v0.8.0