[Tagging] Pistemap proposal

[yvecai]

Is there any objection to move this page out of the Proposed features?
http://wiki.openstreetmap.org/wiki/Proposed_features/Piste_Maps

This is widely used, and the page is stable for long now. From time to 
time some opensnowmap.org users feels like they shouldn't use it because 
of its 'proposal' look on the wiki.
Also, maybe a few changes could be proposed, but it would be easier to 
first settle this wiki page in the 'accepted' ones.

If there is no objection, and someone knows how to do, please do.
Yves