CronJobber

Breaking Change:

Finalized CronJob Model: Incompatible with CronJob 1.0

- Add possibility to enable and disable Cron-Jobs

- Add possibility to edit Cron-Jobs

- Add command to get info of single cron jobs

- Introduction of commands:

- /cron edit <cronjob-id> time <new-time>

- /cron edit <cronjob-id> command <new-command>

- /cron info <cronjob-id>  

- /cron enable <cronjob-id> 

- /cron disable <cronjob-id> 

- Introduction of permissions:

- cron.edit

- cron.info

- cron.enable

- cron.disable