fix(celery): make it decode objectid/datetime on load
roles enpoint has been wired - refactored from user_roles
Merge remote-tracking branch 'upstream/master'
fix(celery): make it convert dates/ids within task args

when you will call a task with data from mongodb you will get the same in the worker
Merge pull request #261 from akintolga/master

Renamed user_roles to roles
Merge pull request #262 from petrjasek/master

fix(celery): make it convert dates/ids within task args