Merge pull request #936 from MITx/feature/cas/tomg/saving-conventions

cms/static/coffee/src/views/module_edit.coffee

cms/static/coffee/src/views/unit.coffee

cms/static/img/spinner-in-field.gif

cms/static/js/base.js

cms/static/sass/_courseware.scss

cms/static/sass/_graphics.scss

cms/static/sass/_subsection.scss

cms/static/sass/_unit.scss

cms/templates/edit-static-page.html

cms/templates/edit_subsection.html

cms/templates/overview.html

cms/templates/unit.html