mladenjovanovic/shorts: Rada gun and air resistance

shorts 1.1.2

• Added get_air_resistance function to estimate air resistance in newtons
• Added predict_air_resistance_at_time and predict_air_resistance_at_time functions
• Added predict_force_at_time and predict_force_at_distance functions
• Added predict_power_at_time and predict_power_at_distance functions
• Now power calculations in predict_relative_power_at_distance and predict_relative_power_at_time use air resistance to do the calculations. The default bodymass is 75kg. To replicate earlier function behavior, use predict_velocity_at_ multiplied by predict_acceleration_at_ to get relative power without air resistance
• Function predict_kinematics now uses aforementioned changes in predict_relative_power_ functions, and added force and air resistance in the output
• Functions find_max_power_distance and find_power_critical_distance now uses aforementioned changes and returns absolute power, rather than relative, and air resistance is used in the power calculations
• Added find_max_power_time, find_velocity_critical_time, find_acceleration_critical_time, and find_power_critical_time functions
• Added model_using_radar_with_time_correction where time_correction parameter is estimated
• Added mixed_model_using_radar_with_time_correction where time_correction parameter is estimated