[push-api] Adding base64 reference (#178)

Closes #177.
You can view, comment on, or merge this pull request online at:

  https://github.com/w3c/push-api/pull/178

-- Commit Summary --

  * Adding base64 reference

-- File Changes --

    M index.html (6)

-- Patch Links --

https://github.com/w3c/push-api/pull/178.patch
https://github.com/w3c/push-api/pull/178.diff

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Reply to this email directly or view it on GitHub:
https://github.com/w3c/push-api/pull/178