CYB-175 https://jira.ets.berkeley.edu/jira/browse/CYB-175
When a new install is done, generate new, long secret keys for the app, and at any time thereafter.  This adds a further layer of security.
[nojira] remove errant byebug statement.
Merge pull request #94 from coyote/remove_byebug

[nojira] remove errant byebug statement.
Merge pull request #93 from coyote/secret_load

Task to generate new application secret key base
CYB-143, CYB-168, and CYB-170.  If students are not present in the DataCultures database, add them.
Merge pull request #95 from coyote/student_create_if_needed

CYB-143, CYB-168, and CYB-170.