Revert "Sending emails when inviting attendees."

This reverts commit 6ee93ea80401054babf912dfd4bc0bf34aa7c36c.
Revert "Finding attendees."

This reverts commit 05570bfe55c64a9e00e4d738019456b566eb8b90.
Revert "A bit more documentation."

This reverts commit e191c35cdfe961b42a96ce3bcf4605d9856cdd20.
Revert "Correcting typo in getFeatures on auto schedule plugin"

This reverts commit 4a2a9976e58f294ff35afb3aa81aff75d0e844db.
Revert "Typo."

This reverts commit be44e796495fb81440a4ad89e20962da203093d5.
Revert "Moved scheduling properties to the scheduling plugin."

This reverts commit 4105fbfa18da80ac0bd64aaa4c08a795ba58853b.
Revert "Added an inbox node."

This reverts commit effea99c38ceb2e5007ebd84bd96cb30e5ce5252.
Revert "Moved all scheduling related functionality."

This reverts commit 996f878d5dfdb9bf6e03bff5aa673dcdbcaccdaf.