XC Map issues and ideas

Possible Enhancements

XAPI ... ideally, I wouldn't need to replicate data, if there would be a reliable XAPI server somewhere. However, maybe such servers would always be "crowded" and I'll keep the local replication after all
comments and pictures on XC tracks
routing for XC tracks ?

an altitude profile is rendered based on the order of the ways which make up a relation - as it seems, this order is not always consecutive - which results in altitude "jumps" (because the next way in a relation continues at some other location as the previous way ended)
additional info (-> POI icons) is presently only available for relations - not the XC ways which are not part of a relation, maybe that needs to be extended
POI overlap: if more than one relation starts at the same location, the POIs overlap, making only one of the selectable -> need to implement a marker cluster
- or make also the lines selectable
Tracks without name don't appear in the list (Generate names in that case, perhaps OSM-ID or something from the attributes (length and grooming))
Pistes on a meadow without an underlaying track will not be displayed (example: pistes around Oberstdorf)