`:startup`/`:once` time specification

[jjl]

This would be handy to have things done at application startup on development that would ordinarily be done periodically in production without having to use two mechanisms.

[ausimian]

K, I'll take a look at this and get back to you.

[jjl]

I still think this is a useful feature, but because of time constraints, I ended up going with quantum instead, so don't add it just on my account :)