SL-13705 - added --deleted option to collect info on no-longer-needed text in translated files. Processing needs to be automated as the list is unfeasibly long.

SL-13705 - language list defaults to the standard supported set of FR, ES, IT, PT, JA, DE. '--lang all' will also use this list

SL-13705 - lock all columns except C in the excel file (apparently google sheets does not respect this setting on import)