improved route description (added distances to the right, bold street
names, orientation in first instruction and non-breaking spaces for
units),
route link now displays the shortened link name,
content of input boxes is only overwritten if the respective node is
set or dragged,
experimental support for reverse geocoding (when setting a new node by
text box or clicking on map)
beautified comments,
moved language settings to config,
moved timeout settings to config,
corrected bug with route link and via nodes,
removed old files,
corrected spelling error for roundabout
changed GUI legal text,
changed via-node deletion to click only,
moved default entries for input boxes to config file,
made input boxes selectable again
