Add stability message for Atom.io API

This indicates that the Atom.io API is not frozen - this is describing the state
of things, not announcing a new policy.
Add autoUpdater shim for Windows
Add basic updater spec
Upgrade to apm 0.71
Maintain autoUpdater listeners even if the version is in dev mode.

This is so we can test the auto-updater
Send empty event arg
Merge pull request #2859 from atom/cj-windows-updater

Add autoUpdater shim for Windows
Upgrade to release-notes@0.33
Streamline character width remeasurement to hopefully avoid exceptions

Previously, I was just remeasuring characters whenever the stylesheets
changed. I think there were situations in which the model changed, then
I remeasured characters prior to updating the view to match the model,
causing DOM exceptions. This switches the approach to only ever measure
characters after an update, ensuring the view always matches the model.
Merge pull request #2865 from atom/ns-react-fix-width-remeasurement

Streamline character width remeasurement to hopefully avoid exceptions
Prepare 0.113
Upgrade to release-notes@0.34
Upgrade to release-notes@v0.35.0
Prepare 0.114.0
Render line-ending invisibles on empty lines

Fixes #2857

Including correct interleaving with indent guides.
Upgrade to settings-view@0.133
Merge pull request #2867 from atom/ns-react-empty-line-invisibles

Render empty line invisibles in React editor
Remove stray logging
Use default implementation of ::destroy from theorist Model class

Move actions that need to happen on destruction to ::destroyed hook.
Emit editor:will-be-removed event when unmounting the React editor