Register all interesting events

As stated in bug #1187833, there's no need to not record all of this events.
We need to filter events on the state anyway.

Also adding update events and documentation on how to enable them.

Change-Id: Ic5845e1a3dc5ed531114e7ccdbe17bb98cb049fb
Signed-off-by: Julien Danjou <julien@danjou.info>
Merge "Register all interesting events"