nteract v0.8.0 release checklist

[rgbkrk]

We are looking fit to ship, so I'm running through the release steps right now.

• [x] npm run dist && open applications/desktop/dist/mac/nteract.app
• [x] choose an alliterative adjective for our scientist, Berliner
  • Burly Berliner
• [x] npm run dist:all
• [x] lerna run prepublishOnly (verification step across all packages)
• [x] npm run verifyBeforePublish
• [x] prepare release notes
• [x] make the actual release

[rgbkrk]

Uh oh, I might have gotten myself into a pickle with that electron upgrade. The dist copy works fine, the dev copy does not. The NODE_MODULE_VERSIONs mismatch even though the ABI really is the same (all are node 8 here).

[rgbkrk]

UI features

• Kernels now sorted by display name in the menu (#2591)
• Improve messaging about kernel state (#2628, #2495)
• Log "extra" stdout / stderr streams from kernel to chrome console (#2646)
• Theme aware title bar in the webapp (#2551, #2547, #2545)
• Clear pager on output clear (#2525)
• Always create block math if $$ occurs in markdown (#2499)
• New Menu Items (webapp):
  • Halt Kernel (#2529)
  • Restart Kernel (#2528, #2512)
  • Unhide and Clear All Outputs (#2517, #2520, #2512)
  • Execute All (#2518, #2519)
• Improved menu look (webapp) (#2494)

Stability

• Editor now tracks subscriptions and closes them (#2505)

Accessibilty

• All octicon SVGs now have a <title> tag to describe their intent (#2587)

New components

• Notebook selection menu (#2623)
  • Note: not integrated in any app yet

Big repo changes

• No more @nteract/types module
• @nteract/commuter-frontend has moved into @nteract/commuter directly to simplify publishing releases (#2634)

Developer Experience

• Electron is upgraded to 1.8.3 (#2632)
• Addressed (almost all) flow type misconfigurations -- you're more likely to have a safe and sane setup (#2563, #2570, #2571, #2572, #2573, #2581, #2583, #2584, #2588, #2594, #2595, #2600, #2605, #2607, #2606, #2609, #2611, #2612, #2613, #2621, #2539, #2529, #2515, #2507, #2501)
• Refactored core into a new "core state" that switches us to a byRef structure and relies heavily on selectors to get state (#2592, #2601, #2603, #2605, #2602, #2614, #2619, #2616, #2620, #2626, #2642, #2541, #2522, #2514, #2511, #2500, #2490, #2493)
• Extract core components into pure and connected (#2578)
• Webpack configurations are more unified across all apps using the nteract webpack configurator (#2593, #2597, #2599, #2627, #2622)
• Hooked up showcase with new monorepo-aware webpack setup (#2622)

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