BLD-205: fix total count.
Merge pull request #1513 from edx/anton/word-cloud-total-count-in-studio-bug

Anton/word cloud total count in studio bug
Implement background email tasks on student dash

LMS-1244
Merge pull request #1558 from edx/sarina/beta_email_background_history

Implement background email tasks on student dash
Clean up some instructor dash code
Adds Staff and Instructor factories