Add datadog tagging support#31

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ychua wants to merge 5 commits intoHubSpot:masterfrom

SEEK-Jobs:master

Commits on Oct 22, 2015

fixed is server check to work with commonjs modules
michaelisgro
committed

Commits on Jan 21, 2016

Commits on Apr 7, 2016

1. add dogstatsd tagging support 2. use path+type+tag as the key when enqueue metrics 3. send performance properties as tags
Ray Hua
committed

Commits on Apr 12, 2016

Merge pull request #1 from SEEK-Jobs/datadog-tagging-support
Ray Hua
committed