Support fingerprinting and prefixing of manifest.json file with broccoli-asset-rev

Generate fingerprinting for manifest.json file
Use broccoli-asset-rev's prepend option
Add the correct file name to the meta tag <meta name="manifest"...
Allow to turn off the fingerprinting of manifest.json file (or at least document how to do it with broccoli-asset-rev).

I tried taking a stab at this but the node tests seem flaky that they timed out without processing anything. Is that a known issue? (Hadn't looked into tests deep enough to uncover what the cause might be)

No, they never timed out on my machine or the CI.

I'm using ember-cli-addon-tests for the add-on's acceptance tests. These tests take a lot of time to run, there's a timeout configuration in the tests. Try with a higher timeout to see if they fail. See

ember-web-app/node-tests/acceptance/manifest-test.js

Line 7 in b040482

this.timeout(300000);