Search: Common query type wrappers

[adamfowleruk]

Common query type wrappers

E.g. we already have list() for a keyvalue query where docs are in a directory, and collect() for docs in a collection. More of these.

[adamfowleruk]

Added collectionsuris() for a values search to return children of a collection uri

[adamfowleruk]

Built options builder object which negates and more complex ones of these now.