Populate naturalLanguage property for all ontologies using the BioPortal Language Tags spreadsheet

[mdorf]

The spreadsheet is located here:
https://docs.google.com/spreadsheets/d/1rYHzsSUNjjRpgD2LxxmvCvg13P-w5g-HvsUvk8VNNJ0/edit#gid=0
and is referenced in this ticket:
ncbo/ontologies_api#149 (comment)

[jonquet]

And as discussed in ncbo/ontologies_api#149 (comment)
Also put it in another property (userInterfacePreferredLanguage) which does not exist for the moment to define the default language the API will send back