read MKTG_URLS from env.json
updating mktg defaults in common.py
updated misused sass body-bg to container-bg variableon account and course views
resolves background color syncing for particular page/container wrappers
Bullet-proofing for MKTG_URLS.
Strip off https://
fixing bug noticed in production
move url() wrapper into SASS variable
Experimenting with optimal event attachment strategy.
Overhaul of event log of load, play, pause, seek, speed-change events.
Merge pull request #69 from edx/valera/event_tracking

Valera/event tracking
GST fixes. Removed red error messages preseneted to the user. The errors are now displayed when a flag is turned on. Added graphical_slider_tool tag to the list which shows staff debug info.
Merge pull request #70 from edx/valera/gst_fixes_hsph

GST fixes
Merge branch 'release'
Merge pull request #95 from edx/fix/e0d/no-name-e

fixing bug noticed in production
Fix XSS vulnerability in instructor dashboard
Merge pull request #104 from edx/hotfix/instructor-dash

Fix XSS vulnerability in instructor dashboard
Merge pull request #106 from edx/release

Merge hotfix-2013-06-07
Merge pull request #98 from edx/giulio/fix-image-urls

move url() wrapper into SASS variable