refactoring of XML validation: consider schema version number read from document, use single class for validating all vecto-related xml files

refactoring of VTP engine - no speed limits, compute engine torque demand based on power demand and engine speed from cycle to compensate for wrong gear selection

add condition in measured speed cycle: if the remaining interval to the next sampling point is too low, reduce the current simulation interval and thus prolong the next one

renaming ETPT to VTP, refactoring: new cycle format, aux handling (speed dependent), correction of engine fan equation

renaming ETPT to VTP, refactoring: new cycle format, aux handling (speed dependent), correction of engine fan equation