Merge lp://qastaging/~kim0/pyjuju/adding-hook-traces-to-readme-for-bashified-example into lp://qastaging/pyjuju

Excerpts from Ahmed Kamal's message of Thu May 26 18:51:41 UTC 2011:
> Ahmed Kamal has proposed merging lp:~kim0/ensemble/adding-hook-traces-to-readme-for-bashified-example into lp:ensemble.
>
> Requested reviews:
> Ensemble Team (ensemble)
>
> For more details, see:
> https://code.launchpad.net/~kim0/ensemble/adding-hook-traces-to-readme-for-bashified-example/+merge/62537
>
> Fixed docs to match hook changes (joined instead of changed) and new execution order

Thanks again, for working on the documentation. Looks good but there are some errors in the traces.

There is no ensemble 'established' hook for relations. Instead we have joined called, all joines
are followed by a changed invocation (independent of if there is an actual change subsequent to
the join). All subsequent change invocations are due to changes in the related units.

Just pushed fixed docs, let me know if that looks good

I'd prefer it if there were a little more distinction between the explanatory comments and the actual hooks which are firing, but this is still useful information and I can't see any drawback to adding it.

lgtm as well

This was created before config-changed, I just realized. So it needs to be updated before merging to reflect when config-changed is run as well.