[Json-rpc-java] Reducing calls to list_method and constructors

[William Becker]

Hi,

I've fixed up the code so that each class registered as a callable
references only asks for listmethods once. This vastly speeds up the
performance of the library when using many callable references.

I have also implemented calls to a constructor. This is on top of my
extension that allows callable references, so each of these things isn't an
atomic addition to the main tree. It shouldn't be do hard to extricate the
various pieces if only one wants to be added and not the others though. If
anyone would like this code, send me a mail and I will send it off to you.
It would be great if some of this stuff got merged into the main tree so I
could get whatever other updates are going on (are there any such things?
The news page doesn't seem to have been updated for a while.)

Cheers,
Will