Show grades in accordion

[Denis Tantsev]

Hi everyone! I'm trying to customize new eucalyptus Open edX for showing grades (completed/total) in accordion for each chapter and graded sections. A year ago I successfully did it on birch release by attaching some code (similar as on progress page) to render_accordion function. It was really slow, so I added some cache to make it faster. Now I want to update to new release, I see that now it's rendering progress page really fast, but code, of course, is very different compared to old release, so I need to completely rewrite my solution. A question for guys who know edX architecture well: what is the best way to do it, is it a good idea to use same functions that build progress page? Maybe another better ideas how to do it?