xmodule scss - resolved some general span styling that would override basic em or strong type styling

Soft Landing UI, Studio Nav Revamp, Sign In/Up Revisions

Flag submissions from staff grading view

Merge branch 'feature/btalbot/studio-softlanding' of github.com:MITx/mitx into feature/btalbot/studio-softlanding

Merge branch 'feature/btalbot/studio-softlanding' of github.com:MITx/mitx into feature/btalbot/studio-softlanding

Feature/marco/addcomponent

:-(

Bugfix/valera/video alpha

add exporting of policy.json

fix module staff accesss - by has_access, not by user.is_staff

Better logging, and make view csrf exempt...

Feature/victor/foldit api

  - ops view for the desktop app to talk to
  - xmodule that talks to the foldit model and displays the student's state
  - grading tweak to make grade updates from an external service work:
    - Add an always_recalculate_grades property to XModuleDescriptor.

Firefox doesn't draw the buttons right with -90deg, but will draw it rig...

Feature/valera/video alpha

Firefox doesn't draw the buttons right with -90deg, but will draw it right if no direction is specified.

700x sandbox

allow "rows" attrib of coderesponse textbox to set box height

studio - soft landing: changed strong elem colors to be more subtle since we're not using new nomenclature