Merge pull request #325 from MITx/feature/kfiedler/courseware-style

lms/askbot/skins/mitx/templates/base.html

...kbot/skins/mitx/templates/meta/html_head_stylesheets.html

lms/askbot/skins/mitx/templates/navigation.jinja.html

lms/askbot/skins/mitx/templates/widgets/footer.html

lms/envs/common.py

lms/static/sass/course/_help.scss

lms/static/sass/course/base/_base.scss

lms/static/sass/course/base/_extends.scss

lms/static/sass/course/courseware/_courseware.scss

lms/static/sass/course/courseware/_sidebar.scss

lms/static/sass/course/discussion/_discussion.scss

lms/static/sass/course/layout/_courseware_subnav.scss

lms/templates/courseware.html