[OSRM-talk] weight instead of speed

[Dennis Luxen]

> afair:
> there is a branch for different foward/backward weight and emil had a
> branch for weight vs time - likely dennis/emil will comment on this

Different speeds for forward and backward directions are already 
available in the develop branch.

Differentiating between travel time and a more abstract form of 
impedance is about to be implemented soon.

--Dennis