Made several changes to the JavaDoc comments in SimpleTemperature and
SimplePressure in order to improve the HTML documentation.
24-July-2014

Vehicle needed changes to become thread safe as values can be accessed
and changed by the scene and sim at the same time and as such is now an
abstract class which implements the VehicleInterface and Simple roto
whatever is a subclass of Vehicle.
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/vehicle/Vehicle.java
Fixing stuff