[WIP] Add sphinx config for new layers

Add sphinx config for: 

ch.swisstopo.skitourenkarte-50.metadata
ch.bafu.sturm-staudruck_30
ch.bafu.sturm-staudruck_50
ch.bafu.sturm-staudruck_100
ch.bafu.sturm-staudruck_300
ch.bafu.sturm-boeenspitzen_30
ch.bafu.sturm-boeenspitzen_50
ch.bafu.sturm-boeenspitzen_100
ch.bafu.sturm-boeenspitzen_300
ch.bav.laerm-emissionsplan_eisenbahn_tag
ch.bav.laerm-emissionsplan_eisenbahn_nacht