Fix piste difficulty tags for some tracks
Fix wrong piste difficulty tags
Add tags for nordic skiing according to current conditions
Add tags for nordic skiing and fix direction of one path
Add weissach loipe start/finish point
Add weissach loipe ski track and parking near start point
Add piste going from Elbrus mountain to Azau
Add Educational-Scientific Base of KBSU
Added "Filzmoosloipe" nordic ski route
Update relations of ski routes in Gnadenalm. Use type=route and route=ski instead of type=site.
Add big part of Tauernloipe cross-country route
Added Hochbifangsloipe cross country ski track in Altenmarkt
Added part of Ortsloipe Altenmarkt
Added tags required by pistes-nordiques.org
Add tags required by pistes-nordiques.org
Link to website moved to special tag, name is corrected
Based on averaging of 4 tracks improved Alfa-bitza XC skiing track