Updated JSDOM to 0.8.4
Fixed timeout issue running test.
Version 2.0.0 alpha 21
Fix xhr onreadystatechange firing multiple times with state 4.
Add window.setImmediate
Add clearImmediate and tests.
Typo
Load 'link' tags as well when loading css is enabled
Load images as resources when 'img' feature enabled

* Adds feature 'img'
* Adds jsdom patch to allow actually loading img tags (instead
  of only triggering the 'load' event).
* Adds exception for decoding response body to string for
  images: those will stay as buffers, like octet-streams.