Autoresponder detection#5

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nicholas-johnson wants to merge 3 commits intor38y:masterfrom

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Commits on Jan 23, 2014

Lets Mitt to recognise an autoresponder (e.g. an out of office alert)
Nicholas Johnson
committed
Mitt verified in Ruby 2.1.0
Nicholas Johnson
committed
Adds new autoresponder fixture to gemspec.
Nicholas Johnson
committed