ALL the Browsers

This is continued work to reimplement ASAP with greater rigor, accounting for all browsers. This includes additional automation for verifying the tests pass in all browsers available on Saucelabs, automation we can extend to perform A/B tests, benchmarks, experiments, and coverage analysis.

These are snapshots of the Saucelabs test results matrix for browser windows, and then browser workers. Grey denotes that Workers themselves are unavailable and the tests were not run. The tests are those in `test/asap-test.js`. These were ported from mocha to a minimal test scaffold designed to integrated with both Node.js and Saucelabs just for this project.

-   Split implementations for browsers and Node.js.
    Now using Browserify-style module redirects.
-   Split implementations of asap and rawAsap.
    rawAsap is used by asap, is about twice as fast, but can be
    stalled by exceptions.
-   Support callable tasks, as a generalization of functions.
-   Use S3 and Mr/s to bundle and publish tests online, for development,
    continuous unit testing, and for ad hoc experiments.
    See `scripts/publish-bundle.js`.
-   Use Saucelabs to create browser compatibility matrices
    for development, continuous unit testing, and releases.
    See `scripts/saucelabs.js`
-   Reevaluate the use of various implementations based on data
    obtained experimentally about all relevant browsers, using
    Saucelabs.
-   Add ASAP Gauntlet benchmark draft.
-   Reimplement tests without a test framework.
-   Use a back up plan for engines that tend to forget timers (Firefox 8–18)
-   Address problem that Internet Explorer 10 web workers dequeue timers in LIFO order instead of FIFO.

![Saucelabs Matrix](https://s3-us-west-2.amazonaws.com/kriskowal-asap/train/integration/57708dddf207ec1da06383d03d8f5dd66b2e45be/saucelabs-matrix.svg)

![Saucelabs Matrix](https://s3-us-west-2.amazonaws.com/kriskowal-asap/train/integration/57708dddf207ec1da06383d03d8f5dd66b2e45be/saucelabs-worker-matrix.svg)
`this.freeTasks` when `this === Task`.