slopemap
fix route browser: routeid must be returned as string
implementation joined ways
render color of nordic ways as shields
filter piste areas by checking for closed ways, instead of area=yes
bugfix: render symbols of relations as well
ignore name tag for ways
improved help text
map title in title case, fixes in help text
fix osm link for joined ways
replace direct_to_template with render
Appropriate comments and minor tweaks for symbol generation
move definitions to configuration
fix json_box for joined_ways, fix mimetype->content_type
use name tag for ways as well (not only piste:name)
add dummy style for downhill without piste:difficulty
use name tag for ways as well (not only piste:name) part 2
add dummy function for elevation profile, to return a clean 404.

elevation profiles are not yet implemented, return a 404 to avoid errors
missing images added
Merge branch 'slopemap' of https://github.com/datendelphin/waymarked-trails-site into datendelphin-slopemap