prettier merges and a more liberal splitter

do not split streets between stations of the same group + enforce no tram tracks a bit harder

bugfix and eye candy

bugfix in progress

easier, automated placement of no-trams-in-right-lane roads. new street signs to identify the different road types.

new pedestrian path, new icon for the tools, prevent some crashes with other street mods

usability improvements, when you want trams in the inner lanes and when you build parallel roads or sharp bends

the slicer cannot break sharp bends anymore

eye candy + more accurate selector for the slicer and the tram tracks multiplier