Bug #13, Implement lightweight unit tests, initially using BusterJS,

* Before implementing bug #12 - extend AccessifyHTML5 for arbitrary HTML 4,
* Initially vanillajs,
* http://busterjs.org
Bug #12, Extending AccessifyHTML5 to add WAI-ARIA roles to HTML 4*

* That is, roles for arbitrary legacy HTML containing <div> etc,
* AccessifyHTML5(): argument 1 unchanged, argument 2 added,
* Commit adds support for `aria-label` attributes etc,
* Todo: add support for `aria-labelledby`,
* #13, `bjs1` unit test still passes + new `bjs2` - BusterJS.
Bug #12, add support for `aria-labelledby` + adjust tests
Bug #13, Improve commenting and unit tests in `bjs[1-2].html` - Buster.JS

* http://docs.busterjs.org/en/latest/modules/buster-assertions
Bug #12, Add `aria-describedby` support to AccessifyHTML5

* Improve comments - pose questions!
Bug #12, Add `//Question:` to highlight TODO comments - pose questions
Bug #13, Buster.js unit tests do NOT work on Internet Explorer, so

* Add conditional comments so that tests aren't run! (They crash MSIE)
* Add a "Sorry.." message for MSIE
Bug #15, Security - filter un-safe attributes and value-types

* Add a Regex match against an attribute 'whitelist' - `ATTR_SECURE`
* Add a typeof test for the value
* Add unit tests - issue #13
Pull #14, Fixed "describeedby" bug, re-minified `accessifyhtml5.min.js`

* ..And enable switching unit test to `min` JS: `/test/bjs2.html?min=1`
* #13, Added unit test for "describee?dby"
* #12, Used Closure: http://closure-compiler.appspot.com/home
Pull #14, fix: `buster.testCase` and `AccessifyHTML5' calls on Load

* Plus, moved test-utility Javascript to `accessify-qutils.js` - #13
Pull #14, extend the `ATTR_SECURE` security whitelist of attributes - #15

* Add, /..|maxlength|placeholder|pattern|type/ - tighten /data-[\w]/ regex
* HTML5 forms support
Pull #14, Re-minified `accessifyhtml5.js` Javascript,

* Bug #13, add unit test for <input type = email > - BusterJS
* Add Github "Fork me" banner in CSS, `yatil/accessifyhtml5.js`
* http://closure-compiler.appspot.com - SIMPLE_OPTIMIZATIONS
Merge pull request #14 from nfreear/master

Pull: support for arbitrary HTML 4 documents, plus unit tests