v2.5.4: Additional streamlining for arcades and installations.

Minor changes only in this patch (unless you are a VR arcade, in which case this is an important one!).

• When returning to the Tour Map, there is now a Settings button to make it clear that you can go back to change certain settings.
  
• The Tour Map area now has buttons for quitting the experience.
  
• When using floor-level tracking and "not sensitive to motion", the tour cockpit's frame is now set to default to appearing "While Moving" (instead of Always On).
  

Additional command-line arguments have been added:

1. --go-directly-to-tourmap (This skips past the initial options and title menu areas to the Tour Map. Note that the --skip-menus argument will override this.)
   
2. --default-to-short-tour
3. --default-to-full-tour
4. --comfort-mode-on-by-default
5. --comfort-mode-off-by-default
6. --skip-calibration-step (Works great when paired with '--default-to-floor-level-tracking' to speed up the flow of getting into the experience, but assumes that the system-level play space is properly configured.)
   

Apologies for the frequent updates lately! Hoping to make additional Tour Guide content the focus of the next one.