Return a hash of success/warning/error messages to aid debugging, and modify accessifyhtml5.js in parallel with JSON Schema,

* Bug #16, Return a hash of success/warning/error messages to aid debugging,
* Bug #17, modify `accessifyhtml5.js` in parallel with JSON Schema,
   * Specifically, new allowed attributes - `ATTR_SECURE`: target, accesskey, longdesc
   * Ignore `_note` comments
   * Flag to replace or concatenate fixes
* Plus, re-minify `accessifyhtml5.js` Javascript.