Release v1.5

What's Changed

• Feature/z snap by @davidborland in #213
• Feature/add training by @hyi in #214
• Feature/training by @davidborland in #215
• Find subvolume by id for getting available assignments by @davidborland in #216
• Move completed sent-back assignments to open review queue by @hyi in #217
• Bugfix/overwrite on refresh by @davidborland in #218
• several bug fixes by @hyi in #219
• added request_review_assignment parameter to request_assignment endpoint by @hyi in #220
• Feature/integrate available reviews by @davidborland in #221

Full Changelog: v1.4...v1.5