add air density to vehicle data, use air density from model data for air drag computation
declaration data adapter: use declaration data; engineering data adapter: use physics constant to fill model data
GUI: set air density (physical constant) in declaration mode

adding input field for vehicle height (required for declaration-mode cross-wind correction in engineering mode)

introduce enum for legislative class, add input field in gui, add reading wrinting json field, change signature of xml reading methods

Standard Browser resolution corrected. Opening User Manual corrected. Updated Jquery Versions in User Manual

add axle type to vehicle dialog, write axle type into json job, read axle type from json job (optional), changing labels, correction enable/disable PTO in declaration mode

implementing XML Report generation. fetching all required input data, make airdragdata a separate component