merge

I merged my maintainance code with the latest torcs code. This does
not include any new features, but merely bugfixes of older ones and
slight improvements in mature modules, such as the grsound module.

Please do test, as this code changes interfaces/car.h and
modules/graphic/ssgraph/grmain.h - among other things.

The learning library is not touched. I think maybe I should move it to
the robottools directory, it seems nicer. My work on the
learning led to the development of a new learning technique, so I am
busy trying it out on some experiments and writing a paper
about it, though I have not tried it yet on TORCS. (still toy problems
like controlling an inverted pole and stuff).

However as far as TORCS is concerned, and with respect to learning, I
am not sure if it is good to combine learning with an already good,
but very constrained robot, or with a mediocre but quite adaptible
one - hey, maybe that's a good research topic.

--

-- 
Christos Dimitrakakis
IDIAP (http://www.idiap.ch/~dimitrak/main.html)

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