Testing TravisCI config.

Encrypted AWS keys and added them to TravisCI config to potentially fix false negative builds.
Added 2.1.0 ruby version and db rake tasks.
Revert "Merge pull request #160 from tmcyf/mailman-refactor"

This reverts commit a7640d08a41c972d471b608450aef71e1cc77717, reversing
changes made to 19d918ca71172a442dbe69cf136ff47d4a1cd082.
Merge pull request #164 from tmcyf/checking-travis

[RDY] Updated TravisCI config
Move iCal export to service. Closes #157.

Events should be exportable to iCalendar. This functionality is now extracted into a service.