Moving code into major_simulation_components; easy to call in loops

- Moving major waypoint traveling code blocks into functions to make
high-level code readable and for-loopable
- major_simulation_components is the new file, with functions for
set_up_target, compute_RLP_properties, define_waypoints_RIC,
convert_waypoints_RLP_VNB, travel_waypoints, and
compute_waypoint_metrics
- simplifying objects passed around for plotting (now use a single
object which is an array of axes)
- high-level code has a new “run_waypoint_traveling” function which can
be called a single time or in a loop; this calls the new functions
saved in the major_simulation_components script