mozilla/addon-sdk — pull request #556 by ochameau (2012-09-06 16:04:00+00:00)
Title: Bug 789056: Document api-utils/system/events and use same names than nsIObserverService

Some documentation for this module and I renamed `type` to `topic` as I don't see much value in having a difference between mozilla world and jetpack one. So that people won't be puzzled by a different naming between various existing docs and SDK one.

https://bugzilla.mozilla.org/show_bug.cgi?id=789056