claiming by workers now also considers priority

Merge pull request #3 from Symphosize/features/priority

actually making the priority sorting work when the claiming happens f…

adding priority to queued tasks cron

Merge pull request #2 from Symphosize/features/priority

adding priority sorting to the CronTask model

adding priority to queued tasks

Merge pull request #1 from CurtK/features/priority

Adding priority field to queued taskes, using cakeDC migrations to ad…

Priority Tasks

Merge pull request #1 from CurtK/features/priority

Adding priority field to queued taskes, using cakeDC migrations to ad…