Merge pull request #71 from techiev2/users

Delegates User.active update to True on first update
Merge pull request #72 from techiev2/users

Adds functionality to remove avatar image with empty string in payload
Fixes key for events json response
Fixes min_length issue with device generated taskId field
Merge pull request #73 from techiev2/tasks

Fixes min_length issue with device generated taskId field
Merge pull request #74 from techiev2/events

Fixes key for events json response