Require `daemons` gem if

[Carrigan]

(Major hack incoming)

The delayed_jobs gem requires the daemons gem to run the bin/delayed_job version of DelayedJob, but does not require it as a dependency. Since we use the executable version, it may make sense to add it as a dependency to tape so that our delayed_jobs role works without having to remember to manually add this.

[sweetmandm]

This is WIP over at require-daemons-for-delayed-job but I haven't had time to try it out yet

https://github.com/sweetmandm/taperole/tree/require-daemons-for-delayed-job