input.Makefile: Maps building: Use new mappings/VegCore.csv as the VegCore vocabulary to canonicalize on, in order to also canonicalize VegCore terms which are not yet mapped to VegBIEN. This results in several DwC terms getting their case standardized according to http://rs.tdwg.org/dwc/terms/. Continue to determine unmapped terms using mappings/VegCore-VegBIEN.csv, because a term should not be considered mapped until it has been mapped all the way through to VegBIEN.