Electron 0.35.1 includes the tray fixes we contributed last week but also includes API restructuring and improvements. Most importantly, modules from electron are now imported via `require('electron')`
Summary:
Several fixes and updates the the Send Availability example package. Switches from
using `electron-safe-ipc` to using `protocol.RegisterStringProtocol` to communicate
with the child window. Changes the URLs in the package from localhost to our live
demo backend.
Test Plan: manual
Reviewers: bengotow
Reviewed By: bengotow
Differential Revision: https://phab.nylas.com/D2271
