Version 0.27.0

• Files are sorted by their original name
• Disallow specifying empty issue IDs
• Log files are displayed inside the browser
• Use ember-concurrency

Hotfix 0.26.2

Fix a bug that caused a faulty issue tracker to stop the whole vacuuming process

Hotfix 0.26.1

• Fix a bug in beam update
• Forbid beaming up the root directory