Merge pull request #161 in VECTO/vecto-sim from...

Merge pull request #161 in VECTO/vecto-sim from ~EMQUARIMA/vecto-sim:feature/VECTO-249-sanity-checks-shift-polygons to develop

* commit '93d08fbf':
  adapt testcases due to changed shift polygons
  extend plotting shift polygons: also show intermediate curves
  implementation of the shifting polygons according to final WB2016
  adapt testcases: no downsift polygon in first gear
  add downshift only for gears above 1
  added validation to shift polygon. moved test 'is left of/is right of' to shift polygon
  added class for drawing shift polygons, comparison influence of gear ratios/axle gear
  computation shift polygons: use n_95h for P5; skip range checks when computing engine speed for certain gear