make mocha use traceur as a compiler.

just like coffee.
Merge pull request #734 from cncolder/mocha-traceur-compiler

make mocha use traceur as a compiler.
Fix comment on xhr.coffee
Merge pull request #735 from gabrielpconceicao/comment-fix

Fix comment on xhr.coffee
Fixed the coffee compilation to work on Windows too
Allow failure for node 0.11 on Travis

The tests have never passed on 0.11 since it was added months ago, so it does not make sense to make the build fail all the time yet
add failing test case showing iframe GET requests' referrer headers are not being set correctly
set referer when creating a new window after setting document.location
set referer to the current window's location.href when creating a new iframe
Fixed the handling of radio groups with the same name in different forms

This includes a backport of the JSDom fix done in
https://github.com/tmpvar/jsdom/pull/870 as zombie uses a much older
version.
Merge pull request #745 from stof/patch-1

Allow failure for node 0.11 on Travis
Merge pull request #746 from TimBeyer/add-iframe-referrer-headers

Add iframe referrer headers
Merge pull request #743 from stof/fix_windows

Fixed the coffee compilation to work on Windows too
Merge pull request #748 from stof/radio_same_name

Fixed the handling of radio groups with the same name in different forms