Mailgun integration#83

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zemccartney wants to merge 11 commits intomasterfrom

mailgun-integration

Commits on Feb 4, 2018

Update README to draft integration approach
zemccartney
committed

Commits on Feb 19, 2018

First coverage-complete pass on mailgun integration / services (incomplete, unlinted)
zemccartney
committed

Commits on Feb 20, 2018

Add state-setting to tests, document code, and lint
zemccartney
committed

Commits on Dec 25, 2018

Commits on Dec 26, 2018

Commits on Feb 10, 2019

Replaced mailgun client lib, audited deps, refactored for efficiency
zemccartney
committed

Commits on Feb 19, 2019

Commits on Mar 20, 2019

upgrade node_js version to 8.1 in .travis.yml
samhstn
committed