Revert "Temporarily roll back to ruby 2.0.0"
Revert "Temporarily roll back to ruby 2.0.0"

This reverts commit 1a193b05df6c5a6dea3b6bd23747e13000c8b33b.

elizabrock/coursewareofthefuture,elizabrock/coursewareofthefuture,elizabrock/coursewareofthefuture