Make library compatible with Node 0.8.8#25

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huetsch wants to merge 2 commits intoweaver:masterfrom

Commits on Nov 28, 2012

Change domain to domainName. Makes the library compatible with Node 0.8.8.
huetsch
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Commits on Dec 18, 2012

Allow unicode email headers (email addresses, subject lines, etc), as per RFC 6532
huetsch
committed