Add the functionality to allow for users to become company administrators [MJ-366]
Remove clean method and add unique_together to Administrators [MJ-366]
Update error message in tests to reflect the use of unique_together [MJ-366]
Add unique_together migration [MJ-366]
Merge branch 'user-company-mapping__MJ-366' of github.com:DirectEmployers/MyJobs into employer-dashboard
initial mydashboard html pages MJ-394