Add a test for DOMTokenList's stringifier.
Work around the fact that idlharness.js doesn't support DOMTimeStamp yet.
[cc] Added messages.json document->error map file
Reflect the changes to DOMTokenList in the microdata tests
Merge pull request #356 from Ms2ger/DOMTimeStamp-idlharness-workaround

Work around the fact that idlharness.js doesn't support DOMTimeStamp yet.
Merge pull request #360 from julienw/fix-dom-microdata-test-new-spec

Reflect the changes to DOMTokenList in the microdata tests
Merge pull request #355 from Ms2ger/DOMTokenList-stringifier

Add a test for DOMTokenList's stringifier; r=zcorpan
[cc] @media MQ ratio, allow whitespace. r=zcorpan