[redland] Redland Java API update

[Dave Beckett]

I've been testing out this new API and reworking the class names to
be JavaTwiddlyCaps and methods to be lowerCaseFirst() etc., updating
the methods, making a couple of classes implement some java.lang
interfaces.  As usual with the language interfaces, there are some
bugs to shake out due to object lifetime issues but it seems to be
mostly working.

With respect to interfacing with other Java systems - Redland would
be a "dumb triple store" or some sort of backend for other Java
systems.  This seems relatively easy to do e.g. for Libby Miller's
Squish.  Jena and SiRPAC have a lot larger interfaces that would need
to be filled out, so that isn't going to happen soon.

Dave