Parsing a sequence of JSON values that are not enclosed in a JSON array

Parsing a sequence of JSON objects is not possible, but the standard says:

````
JsonParser can be used to parse sequence of JSON values that are not enclosed in a JSON array, e.g. { } { }. The following code demonstrates how to parse such sequence.

JsonParser parser = Json.createParser(...);
while (parser.hasNext) {
parser.next(); // advance parser state
JsonValue value = parser.getValue();
}
````

See also: https://github.com/leadpony/joy/issues/14

Start with the JsonParser API and compare its current behavior with the standard's sequence-of-values example. Review the related leadpony/joy issue for context, then verify that the requested sequence can be parsed and each JsonValue retrieved without an enclosing array.

Written by the indexing model from the issue text.