Add email verification to the metrics that go to kpiggybank.

fixes #3528
Send /wsapi/stage_* events to the KPI backend.

* Add tests in tests/kpi-test.js to ensure both staging and completion events are added to the queue.

fixes #3920
Merge pull request #3972 from seanmonstar/statsd-0.0.7

upgrade to node-statsd 0.0.7

Selenium, backend, front end tests all pass.

r+
testmob.org has been reaped. Removing from dep list.
Allow UA to submit arbitrary claims to assertion
correctly test claims is an Object
Add unit tests for the expected behavior of experimental_allowUnverified.

* Fix a problem with validateUserAssertedClaims where everything but objects were allowed. Only objects should be allowed.
Add Luke Howard to the CONTRIBUTORS list.

fixes #2910
Merge branch 'lhoward-userAssertedClaims' into dev
Ensure the rp name is specified even if no siteName is specified for check_registration and verify_primary_user.

fixes #3976
Merge branch 'issue-3976-undefined-sitename' into dev
Merge pull request #3968 from shane-tomlinson/issue-3528-email-verification-metrics

email verification metrics
update convict from 0.0.6 to 0.4.1

anti bit rot