optimize migration
Merge branch 'master' into optimize

* master:
  updates to api to support assignment of projects
  fix for assigned
  updating api to morph incoming assigned user
remove filters from Task resource api
remove created and last_edited from Task resource api
add api sorting for task resources
added custom paginator
disable, effectively, pagination for backlog
set completed_on for tasks moved to completed or archived
completed swimlane sorts by completed_on desc
remove completed_on ordering for completed swimlane