#3665: added lists for in- and output variables to modeldescription struct
#3665: added in-and outputlists to allocation and clearing routines
#3665: extended fmi1_xml_handle_ModelVariables to provide list for in- and output variables in modelDescription, extended fmi1_xml_get_direct_dependency and fmi1_xml_get_direct_dependency_size to deliver list of all inputs instead of empty list in case of lacking dependency.