slight improvement to "Why Euler angles are horrible"

[petaflot]

first, I want to apologize for "being a nuisance" in #217 , I will try to be as short as possible.

as a matter of fact, your comment about

feel free to write your own function, like

def my_personal_idea_of_what_euler_angles_should_be(alpha, beta, gamma):
    return np.exp(alpha*quaternion.x/2) * np.exp(beta*quaternion.y/2) * np.exp(gamma*quaternion.z/2)

was the thing that made me go like "oh right this is what I missed". IMHO it should be included to your rant on Euler angles.

also and as a side note, I was surprised to get AttributeError: module 'quaternion' has no attribute 'w'

cheers and thanks for the work.

from someone who finds it so weird and unintuitive that

q = np.quaternion(1,2,3,4)
q.a == (1+4j)
q.b == (3+2j)

(yeah I should have tried this before)