added bikeencoder with two weights
add reverse methods to FlagEncoder to avoid selection between 'fastest' and 'fastest2' for bike2
minor fixes
updated to latest Leaflet.Elevation with nice drag feature - thanks @MrMufflon
Path4CH needs to specify orientation(if reverse)
fixed bug that avoids swapping fulll flags for shortcuts; fixed minor bug: start of lastEdgeIndex has to be -1