Avoid CORS error returned by jsonld by using "https://schema.org" instead of "http://schema.org" in the servicemeta context

#4

Also fixes a bug that caused the page to refresh unprompted

Overhaul of the code handling people to allow organizations, could be expanded further to consortiums or other actors.

This function Checks if at most one of the elements in an array is a key in the doc Object. If one is present, returns the value

Adds two functions : getFieldsInObject and getIfExactlyOneField to make the check for type/@type and id/@id