Partially improve subway track positioning between Stadthalle and Rathaus
Finish up subway emergency exit tagging
Retag note to name for emergency exits.
Tag maxspeed for some subway crossovers
Add switch refs for the Eberhardshof signal box
Remove incorrect crossover tracks and tag switch refs
More minor track positioning corrections between Stadthalle and Klinikum stations
Minor subway updates around Hardhöhe station
More minor track positioning corrections between Stadthalle and Klinikum stations
Track positioning correction work between Stadthalle and Klinikum stations
First correction work between Stadthalle and Klinikum stations
Add subway emergency exit number 20
Add subway emergency exit number 9
Yet another correction on subway track positioning betweem Klinikum and Hardhöhe