new proposed_schema.xls
restore old field name column from previous proposed_schema.xls
update convert_schema for new columns in proposed_schema.xls
metadata_schema: use new field labels
metadata_schema: include new french descriptions
metadata_schema: remove now unused camel_to_label
metadata_schema: remove unused info from schema.json

iso_multiplicity, nap_iso_19115_ref, domain_best_practice, implementation, data_gov_common_core
rdfa_lite, name_space
minor code formatting
rename metadata_schema/convert_schema.py to build_schema/build_schema.py