"from pylab import *" will no longer override min() and max()

my comments on modules being exposed appear to have fallen

    > into a vacuum. I still ask if "from matplotlib import *"
    > should expose the time module or the sys module?

Hi Danny,

Apparently your voice has escaped the void! I added the __all__
attribute to the pylab module to restrict the symbols it exports
strictly to matplotlib and numerix symbols, which should protect you
from these kids of unexpected effects.