Added enrollment events and new member fields
Merge pull request #3588 from edx/ahodges/documentation/AN992

Ahodges/documentation/an992
Remove press-page machinery and assets
Update LTI component information per new Studio UI
Merge pull request #3553 from edx/sylvia/docs/DOC-294

Update LTI settings information
Merge pull request #3618 from edx/ned/remove-press-stories

Remove press-page machinery and assets
Tolerance expressed in percentage now computes correctly. [BLD-522]
Modified and extended tests on percentage expressed tolerance.
Addressed comments.
All tests pass now.