[fluxus] cvs commits (was Re: 0.12b1 + cvs merge)

[dave]

okeydokey, seeing as that install was so effortless for you Claude... :)

* PLTPrefix, PLTInclude, PLTLib are all configurable at the top of
SConstruct (do we want to be able to set them on the commandline?)
* "png/png.h" to "png.h" in tests
* Added -rdynamic
* made dada.h/cpp const correct
* removed all <plt/*.h> from the extensions
* pass the collects location from the SConstruct to main.cpp (managed to
figure out the escape sequence for all the quotes involved:
env.Append(CCFLAGS=" -DCOLLECTS_LOCATION="+"\"\\\""+CollectsLocation
+"\"\\\"") )

I couldn't swap mzsheme and mzgc in the tests, that didn't seem to work
here..?

I also install the modules to the main PLT collects path (built from
PLTPrefix etc) as I think that's the right thing to do... Will that be a
problem?

cheers,

dave