Reintroduce polar coordinates and local propagated variables
Radial coordinates and local propagated variables were not well defined and were removed. They should be introduced after #13 (closed) is solved.
Variables and branches to be introduced:
- rechit r;
- rechit phi;
- propagated local x;
- propagated local y;
- propagated r;
- propagated phi;
r and phi are local coordinates only. They should be assigned by the DetectorGeometry::createRechit
function.