Removed assignments that accidentally created gloabal variables.
Removed references to non-existent globals.
Fix rowIndex for detached table rows
Make <img> `src`'s evaluate relative to `location.href`.

Closes #470.
Don't publish `.travis.yml`.
Updates to testing info in `Contributing.md`.
Version 0.5.4
Add a <select> test I found un-pushed.
Fixed type-o in comment.
Add (failing) test case for <input readonly="">

The readOnly attribute of the input should be true according to
  HTML4: http://www.w3.org/TR/REC-html40/intro/sgmltut.html#h-3.3.4.2 as well as
  HTML5: http://www.whatwg.org/specs/web-apps/current-work/#boolean-attributes
.
Fix boolean attributes
Add (failing) test case for <option selected="">

The selected attribute of the option should be true according to
  HTML4: http://www.w3.org/TR/REC-html40/intro/sgmltut.html#h-3.3.4.2 as well as
  HTML5: http://www.whatwg.org/specs/web-apps/current-work/#boolean-attributes
Fix selected attribute

The element <option selected=""> is selected.
Update dependencies, including nodeunit.
Version 0.5.5
Add tests for onevent props and setAttributeNode & attr::set value

The test cases fail, because onevent properties are only set in setAttribute.
Move onevent property setting to _attrModified

This keeps onevent properties up to date when attr.value has been set or
setAttributeNode or removeAttribute[Node] has been called.
Delete onevent properties on removeAttribute[Node]
Add (failing) test cases for name and id member lookup properties on HTMLCollections
Set named properties (name and id member lookup) on HTMLCollections