(cherry picked from commit 40f6ba5e)

updating documentation on xml input schema, make sure all pictures are similar, adding namespace and base type info

adding parameter max acceleration for eco roll to input parameters (enigineering mode), adding input field to gui, json file writer; renaming .vmod solumn ignitionOn -> iceOn; updating user manual

simplify structure of shiftlines according to Voith-Proposal: no interpolation for load-stage 5, put average values into vgsv file directly

when searching for TC operating point on engine drag curve, enforce engine speed slightly above idling speed to avoid issues due to precision and search tolerance