… sytax change
…ed some of xing's code, and added specs to bring coverage to 100%
…arized model name as a column.
…odel existence via tables through handling of a special 'PickleRef' column.
…nt rather than calling #name and putting that in the error message. This gives us a less confusing error message.
…doc doesn't like trailing / on plain links so used a named one)