CYB-122 Sync activity updating
* fixed issues with builders (no such field as 'uid' and was missing fields as well)
* student scores are recomputed and cached on call to Activity.update_scores!
  * This is called by the EngagementIndexScoringProcessor, which in turn is called by the cron updater and the thor (hand) updater
Merge pull request #60 from coyote/sync_activity_updating

Sync activity updating
[nojira] rename example file to avoid real file overwrite on deploy
Merge pull request #62 from coyote/rename_config

[nojira] rename example file to avoid real file overwrite on deploy
CYB-134 Move the config file(s) outside of the repo.  A dummy structure file exists in config/ for Travis, and to show anyone using the code how to structure their config data.
Merge pull request #64 from coyote/travis_friendly_ext_conf

CYB-134 Move the config file(s) outside of the repo.
Merge branch 'master' of https://github.com/ets-berkeley-edu/datacultures into CYB-110-erica
squash this later