Instrument sequentials with segment-io so we know when people switch tabs manually or using the arrows to navigate
Incorporate Segment.io into Logger.log with whitelist
Add new Jasmine test to ensure Segment.io is called when appropriate
Write Jasmine tests to prove Segment.io works in Logger
Abridge tests in light of learning how Segment.io works
Merge pull request #181 from edx/renzo/segment-io-sequentials

Instrument sequentials with segment-io