Outdated Intersection 0.1.2.3

This update fixes some issues with scoring and timers, as well as adding in some new levels:

• Fixed scoring carying over from previous scenarios and timers ending too early
• Fixed shockwaves not showing when a vehicle leaves the scenario
• Target car sign now changes colour to green when crashed into
• Three new scenarios:
  • Around A Roundabout (Easy)
  • Car Skimming (Medium)
  • Circular Car-nage (Medium)

Next update will hopefully focus on getting the hubworld system in place .