added mode bar up top
Merge branch 'master' into ux/marco/studio-componentsettings
Modifications to instructor dashboard - enrollment tab:

- Remove single enrollment/unenrollment
- Make unenrollment work with multi-email listbox.
- Provide checkbox for auto-enroll on activate if user not yet signed
up.
- Enroll student when activating if auto-enroll flag set.
Merge branch 'master' of github.com:MITx/mitx into feature-dcadams-usermanagement
Some cleanup.
aria tabs v1
Merge branch 'master' of github.com:MITx/mitx into feature-dcadams-usermanagement
non revision
Merge branch 'master' of github.com:MITx/mitx into feature-dcadams-usermanagement
Fix pep8 violations.
Merge branch 'master' into ux/marco/studio-componentsettings
changes with aria
added shell of css and html organization
plugged in more pseudo code for various css class states necessary as well as examples for dropdown case and extra logic required there
moved bad variable name
removing variable names to get it to run again
reverting all variables in attempt to properly load unit pages
Merge branch 'master' into ux/marco/studio-componentsettings
branch now runs, but none of the styles are there yet. pushing this mostly to view component.html
starting settings