Fixing various workflow glitches

* add `make stop`
* fix DNS resolution in VirtualBox after sleep/wifi switch
Because it just doesn't look right after years of `service apache2 stop`. Second reason is that I want to run it automatically on `vagrant up` and that means there is no console allocated. The user story of a person in this case "I am designer on Windows, so I just need access to web site root".

The most of my motivation (confirmed with experience with different groups of people) is driven by the fact that perception matters and small improvements in process can lead to larger gains of contributions. I know that some unix guys hate this philosophy, but I inclined that we need to apply "don't make me think" principle to all things that are not directly contributing to the goal that we need to reach. There is a good book about that for the web http://www.sensible.com/chapter.html