xMapmatch test client

[Joost]

Another small update:

Improvement: input points that have a speed that is lower then 4 meter per second are colored pink instead of blue. This makes it easier to see which points are important to be matched for a "check speed limit" use case.

[Joost]

Another qol update:

Improvement: input and output shapes in ball form are replaced by triangles that are pointed in the direction of its respective heading.