v0.9.3

• Add a background color to boot process to look a little nicer
• Optimize screen grabber code, fix some CPU spikes
• Fix bug with (I think) newer versions of Electron where opening a
  BrowserWindow would trigger a reset of idle time on Windows.
• Hide mouse by using robotjs to move mouse off screen when showing screensaver. This seems like the only way to consistently not have a cursor showing when the screensaver is running
• Build ASAR packages -- should be smaller and maybe a little faster to load?
• Tweak state machine to rely on idle time checks and not much else
• Implement crash reporting, and some sentry.io error reporting
• Assorted library/code updates