* More intuitive way of plot_covariance_ellipse() in EKF and UKF
* Add the same changes in UKF as well
* Modified rotation matrix to scipy.spatial.transform.Rotation
* Modified angle of covariance matrix
* Fixed typos
- changed resampling function so that it chooses random number once for the starting point.
- condition check is moved from the inside of the resampling function
to the outside of the function, this way the purpose of the
function is much clear. Instead "resampling" every iteration,
resample if the condition holds.
condition check is moved from the inside of the resampling function
to the outside of the function, this way the purpose of the
function is much clear. Instead "resampling" every iteration,
resample if the condition holds.
