Fix invalid @see tag references in KiwiUrls

[sleberknight]

Problem

You can't do this:

@see #queryStringToMap(String) for inverse

The rendered Javadoc just contains "for inverse" as a link.

How to fix:

For queryStringToMap:

@see #toQueryString(Map) toQueryString(Map) for the inverse operation

For toQueryString:

@see #queryStringToMap(String) queryStringToMap(String) for the inverse operation

I hate having to repeat the method signature, but that's on javadoc, not me. 👿