[Tagging] Another reset on roundabouts

[Martin Vonwald]

I reverted to the previous version and added a note about void in case
of elevated roads.

2012/5/18 Martin Vonwald <imagic.osm at gmail.com>:
> Ahm - you completely screwed the article :-S
>
> 2012/5/18 Steve Doerr <doerr.stephen at gmail.com>:
>> On 18/05/2012 13:45, Volker Schmidt wrote:
>>>
>>>
>>> We should replace "island" with "island  or obstacle" or something to that
>>> effect.
>>
>>
>> I've changed it to 'an island or a void'.