0.17.0

• Upgrade to new @phosphor packages - brings a new Command Palette interaction that should be more intuitive, and restores the ability to drag to dock panel edges #1762.
• Refactor of RenderMime and associated renders to use live models. See #1709 and #1763.
• Improvements and bug fixes for the completer widget: #1778
• Upgrade CodeMirror to 5.23: #1764
• Numerous style updates and bug fixes.

Version 16

• Adds a Cell Tools sidebar that allows you to edit notebook cell metadata. #1586.
• Adds keyboard shortcuts to switch between tabs (Cmd/Ctrl LeftArrow and Cmd/Ctrl RightArrow). #1647
• Upgrades to xterm.js 2.3. #1664
• Fixes a bug in application config, but lab extensions will need to be re-enabled. #1607
• Numerous other bug fixes and style improvements.