monsieurtanuki feature/#1089 - demo of polyline animation
New class:
* `MilestoneMeterDistanceSliceLister`: lists the vertices for a slice of the path between two distances

Impacted classes:
* `MilestoneDisplayer`: added methods `drawBegin` and `drawEnd` in order to add drawing features
* `MilestoneManager`: included the use of new methods `drawBegin` and `drawEnd` of class `MilestoneDisplayer`
* `SampleRace`: added animations to the demo; refactored
Latest commit 6cf4169 Jul 15, 2018

This is the sample app on Google Play