map add directives (eta, distance conversion) and a wrapper for google directions
location: start retrieve the eta and the distance from the meet up point
map: select travel mode ok
location: compute the location immediately  if a new meet up point is set or if the travel mode has changed
location: do not compute stuff if the user click on the same travel mode
location: do not compute anything if the user didn't move
map: fix height 44px travel mode toggle button
location: compute the location when it s not the current who changed the meet up point
user location: do not manually compute location if there is no location