Support drush with channels and jobs

Elysia cron drush commands should be able to start channel or individual job as it does in web UI.

$ drush help elysia-cron
Run all cron hooks in all active modules for specified site using elysia cron
system. Use this instead of "core-cron" if elysia_cron module is installed.

Examples:
 drush elysia-cron               Run all cron hooks, next channel in sequence (default)
 drush elysia-cron mychannel     Run all cron hook jobs in mychannel
 drush elysia-cron myjob         Run just hook myjob
 
Arguments:
 channel                         Elysia cron channel
 job                             Elysia cron job
 status                          Elysia cron status (last run, execution count, abort count, average/max time)