Move ansible cofiguration group to webservers

We we later look at this, we'll be building a webserver. So, this is
less change later. Also, it can be less confusing if we use something
meaningful (like a webserver group) instead of just the group 'example'
Merge pull request #8 from glenjarvis/change/move_ansible_group_to_webservers

Move ansible cofiguration group to webservers