Flagencoders for foot-walking and foot-hiking

[TimMcCauley]

We currently do not have flag encoders for hiking and walking (graphhoppers are being used). We should be adding these as routing results for both can be increased, a pedestrian example route along a bundesstraße (instead of going through the forest):

http://maps.openrouteservice.org/directions?n1=49.883642&n2=8.884734&n3=14&a=49.894931,8.836895,49.886613,8.924247&b=2&c=0&k1=en-US&k2=km

We need someone to have a close look at the flagencoders of these profiles in terms of "usability". The hiking profile could be examined carefully looking at hiking paths in alpine regions.

https://github.com/GIScience/openrouteservice/wiki/Tag-Filtering