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Hotfix for CORS issue when no Origin header is present.

closes #986, #961
Update README.md
Update README.md
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Update README.md
Update README.md
Update README.md
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Update es.json

In spanish: Welcome=Bienvenido
Fix the join room variable reference error.
Merge pull request #1056 from andyzhau/master

Fix the join room variable reference error.
Merge pull request #1046 from bicherele/patch-1

Update es.json
Added stylus and sass css preprocessor options