[WIP] August newsletter

* Are we advertising the September workshop yet?
* Fix the September workshop link.
* Any additional news?
* Jobs?
* Should we hold off on the code of conduct announcement til next month?
I that case I'd like to change it to a 15 min talk, because a lot of the suggested topics we have are tough to cram into 5 minutes.  Or perhaps we can split into 15 min presentations and then 5 minute lightening talks.