Quartz Cron Format

[felixruponen]

Hi!

I've forked your repository and implemented the same functionality but with the quartz format of cron expressions. If you are interested I can make this an option you can choose which format to use, ie. Unix Cron or Quartz cron.

Let me know if you are interested, check out the modifications at,

https://github.com/felixruponen/jquery-cron