Update sw cache list to include ConsoleManager and whitespace extension

[humphd]

Before we update prod, I need this to land so that we cache the new files we've added in recent commits to our service worker cache.

NOTE: this is going to get simplified in #634, where I'll just tell it to use everything in dist/ so we don't miss files. I need to land a few patches before that, though, so this is a stop-gap.

[humphd]

If you want to test this:

• npm build and grunt swPrecache
• npm start
• load http://localhost:8000/dist/hosted.html (note the dist/ vs. src/)
• Open your web console, go offline, refresh
• It should load again.

There is one file that will be 404, the client/main.js, which is just a thing with require, not a real bug.

[Pomax]

• make sure cache-disable-with-dev-tools is NOT on
• application -> service workers fiddle with "update on reload" and "bypass for network"

[gideonthomas]

r+ since this is a temporary fix