Add support to run job NOW AND LATER instead of just LATER

[opslock-benjamin]

After reading the docs I couldn't find a way to run crons now as soon as i start , and then later at the next interval.

Is there a way to do this currently?

If not I think its a worthy feature to test code easier instead of modifying 1000 registered functions to run every 1 second

[zeewell]

#436