Ensure mobile events are exported
Merge pull request #46 from edx/gabe/export-mobile-source

Ensure mobile events are exported
Fix flaky acceptance test
Merge pull request #48 from edx/gabe/fix-flaky-test

Fix flaky acceptance test
Update acceptance test for database exporter
Merge pull request #49 from rocha/update-exporter-acceptance-test

Update acceptance test for database exporter
WIP: add total events count.
Capture all events.
Working prototype.
Cleanup.
Additional cleanup
Add mapper tests.
Count event even if it's not a valid event.
Add test for no timestamp.
Use combiner, refactor.