Starts docs for stable release 05
More docs
Recorders sections in docs
Docs for class flags stuff, #1234 and #1276.
Adds docs for open classes deadline
Fixes sections in release summary page
rel5 admin documentation: Stripe, group texting, custom template Javascript.
Program module docs fixups
Adds release notes on student apps
Adds release notes for teacher bio privacy
Adds onsite changes to changelog
Merge pull request #1384 from learning-unlimited/docs

Docs for stable release 05