process_model - rvt_file_version fixed, docstr, installed_rvt_detect added, paths() refactored, depract info added
process_model - rvt_file_version fixed, docstr, installed_rvt_detect added, paths() refactored, depract info added

hdm-dt-fb/rvt_model_services,hdm-dt-fb/rvt_model_services