Fix missing 3gpp attrs (#34) * Fix imcomplete headers/columns names When processing more than 1 file and one of the files is missing the 3GPP attributes e.g. file 1 has vs:vsDataSomeMO and file2 has SomeMO and vsDataSomeMO. * Clean up
Fix missing 3gpp attrs (#34) * Fix imcomplete headers/columns names When processing more than 1 file and one of the files is missing the 3GPP attributes e.g. file 1 has vs:vsDataSomeMO and file2 has SomeMO and vsDataSomeMO. * Clean up