symbolab integration
moved symbolab into exercises
deploy now updates khan-exercises and symbolab to latest master
deploy: add a log message
fix for subhints in symbolab exercises
update exercises
Merge branch 'new-logos' into symbolab
hebrew translations for error page
fix - logo box fo ani10
hebrew translations for error page
allow full screen on videos
Merge branch 'production' into symbolab
removed symbolab submodule from server repo (moved to khan-exercises repo)
style fixed to new assoc tooltips
fix ani10 link
ignore symbolab errors for now
update exercises
Added Rackspace logos
bug fix in generating class_progress_report_graph (reported by Roee)
type fix in Rackspace text; an attempt to remove youtube-related videos at end