Make deep copy of message data from background script event.

The event object now appears to be immutable in FF32, so mutations to the object were failing.
Merge pull request #69 from mitro-co/ahilss.fix-firefox32

Fix Firefox 32
new release for fixed FF
production/ansible: Disable nginx SSLv3 for POODLE

Verified with: openssl s_client -connect www.mitro.co:443 -ssl3
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