Change last name checking to simulate (some of) jackdaw behaviour

Crack at #16 (closed)

Had to remove case-insensitive collation on last_name to be able to do a LIKE. As last_name is both created and checked after passing through normalise_name it will always be in uppercase.

Fixed autofield warning

Correct factory creation of name to be full name surname(s) (title) (initials)

Lots of test messing about

(probably needs commit revision before merging)