fixes #221, initial sync*, async, async* implementation

test/js_test_tools/chai/README.md

-[![Chai Documentation](http://chaijs.com/public/img/chai-logo.png)](http://chaijs.com)
-
-Chai is a BDD / TDD assertion library for [node](http://nodejs.org) and the browser that
-can be delightfully paired with any javascript testing framework.
-
-For more information or to download plugins, view the [documentation](http://chaijs.com).
-
-[![Build Status](https://travis-ci.org/chaijs/chai.png?branch=master)](https://travis-ci.org/chaijs/chai)
-
-[![Selenium Test Status](https://saucelabs.com/browser-matrix/chaijs.svg)](https://saucelabs.com/u/chaijs)
-
-### Plugins
-
-Chai offers a robust Plugin architecture for extending Chai's assertions and interfaces.
-
-- Need a plugin? View the [official plugin list](http://chaijs.com/plugins).
-- Have a plugin and want it listed? Open a Pull Request at [chaijs/chai-docs:plugin.js](https://github.com/chaijs/chai-docs/blob/master/plugins.js#L1-L12). 
-- Want to build a plugin? Read the [plugin api documentation](http://chaijs.com/guide/plugins/).
-
-### Related Projects
-
-- [chaijs / assertion-error](https://github.com/chaijs/assertion-error): Custom `Error` constructor thrown upon an assertion failing.
-- [chaijs / deep-eql](https://github.com/chaijs/deep-eql): Improved deep equality testing for Node.js and the browser.
-
-### Contributors
-
-     project  : chai
-     repo age : 2 years, 3 months ago
-     commits  : 756
-     active   : 170 days
-     files    : 57
-     authors  :
-       540  Jake Luer               71.4%
-        79  Veselin Todorov         10.4%
-        43  Domenic Denicola        5.7%
-         6  Ruben Verborgh          0.8%
-         5  George Kats             0.7%
-         5  Jo Liss                 0.7%
-         5  Juliusz Gonera          0.7%
-         5  Scott Nonnenberg        0.7%
-         5  leider                  0.7%
-         4  John Firebaugh          0.5%
-         4  Max Edmands             0.5%
-         4  Nick Heiner             0.5%
-         4  josher19                0.5%
-         3  Andrei Neculau          0.4%
-         3  Duncan Beevers          0.4%
-         3  Jake Rosoman            0.4%
-         3  Jeff Barczewski         0.4%
-         3  Ryunosuke SATO          0.4%
-         3  Veselin                 0.4%
-         2  Bartvds                 0.3%
-         2  Edwin Shao              0.3%
-         2  Jakub Nešetřil          0.3%
-         2  Roman Masek             0.3%
-         2  Teddy Cross             0.3%
-         1  Anand Patil             0.1%
-         1  Benjamin Horsleben      0.1%
-         1  Brandon Payton          0.1%
-         1  Chris Connelly          0.1%
-         1  Chun-Yi                 0.1%
-         1  DD                      0.1%
-         1  Dido Arellano           0.1%
-         1  Jeff Welch              0.1%
-         1  Kilian Ciuffolo         0.1%
-         1  Luís Cardoso            0.1%
-         1  Niklas Närhinen         0.1%
-         1  Paul Miller             0.1%
-         1  Refael Ackermann        0.1%
-         1  Sasha Koss              0.1%
-         1  Victor Costan           0.1%
-         1  Vinay Pulim             0.1%
-         1  Virginie BARDALES       0.1%
-         1  laconbass               0.1%
-         1  piecioshka              0.1%
-
-## License
-
-(The MIT License)
-
-Copyright (c) 2011-2014 Jake Luer <jake@alogicalparadox.com>
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.