feature request: Scipy plotting in Inkscape, code attached

I like the function plot rendering extension in Inkscape (funcplot.py). I wanted to be able to use the plethora of functions in numpy and scipy (http://docs.scipy.org/doc/scipy/reference) with the extension. Therefore I added a few lines of code to Inkscape's funcplot.py to make this possible. Now a user of Function Plotter can plot functions like
scipy.stats.hypsecant.cdf(x,scale=.2,loc=.5) + scipy.special.i0e(x)

A patch is attached. It just loads scipy and the required submodules if they are are required given the user's input function. Equivalent functionality could be achieved by importing all the scipy modules at the beginning of the funcplot.py, but there are a lot of them, and importing them all is very slow. If scipy is not installed or a user mistypes a function name, the extension should fail as usual, noting the absence of said module or function. Feel free to use the patch. I find it very useful.