inputs/SALVIAS-CSV/maps/VegCSV.organisms.csv: Added _alt to height_m, stem_height_m to choose between them when both are specified (rather than having bin/map choose their priority order based on their order in the map). Note that when both of the heights are specified, they are always either the same, or height_m is invalid (see <https://projects.nceas.ucsb.edu/nceas/projects/bien/wiki/SALVIAS_issues#Some-organisms-have-one-stem-but-different-heights-in-the-organisms-and-stems-tables>).
inputs/SALVIAS-CSV/maps/VegCSV.organisms.csv: Added _alt to height_m, stem_height_m to choose between them when both are specified (rather than having bin/map choose their priority order based on their order in the map). Note that when both of the heights are specified, they are always either the same, or height_m is invalid (see <https://projects.nceas.ucsb.edu/nceas/projects/bien/wiki/SALVIAS_issues#Some-organisms-have-one-stem-but-different-heights-in-the-organisms-and-stems-tables>).