added directory and readme
python skeleton and build setup
first attempt at __add__
python module/class reorganisation, top level test target
mvpoly base class, mvpoly_cube multiplication

Placeholder base class (new-style) created, no methods yet.
Implemented multiplication via scipu.signal.fftconvolve, works
fine in 1d but will probably need dimension-padding to work
when the arguments are different dimensions.
more metadata in setup script
added monomial constructor
coef attribute decorated with @property, added setter
added __get/setitem__ methods for mvpoly.cube
added mvpoly.cube negate and subtract
redirected mvpoly.cube __call__

The __call__ method (handling, eg, p(1,2,3)) redirected to
a Numpy array Horners evaluation of the polynomial in
mvpoly.util (which is only a stub at present)
added check for python sphinx in configure.in
python sphinx documentation stub
python sphinx docs integrated into build scripts
python documentation stubbed pages
Tidying of docstrings for the Sphinx documentation
renamed util.py to util/cube.py, so specific to the data
The bulk of the MVPolyCube class documented
added base class docs, some tidying
tidied up the docstring for maxmodnd()