Update pure_scattering_plot.py

a small change for colorbar label,
now works with my new matplotlib installation
Tentative fix for issue #89.

Try to be more generic in the configure script when checking for funky gfortran compiler names.
Merge pull request #90 from bluescarni/fix_compiler_id_gentoo

Tentative fix for issue #89.
Install all dependencies for Travis from binaries
Merge pull request #91 from astrofrog/binary-deps-install

Try and install all dependencies from binaries
Merge pull request #62 from goranka/master

Update pure_scattering_plot.py
Added I/O file for voronoi (same as octree for now)
Added grid type for Voronoi grid
Added cell type for voronoi
Added KDTree routines
Working implementation of Voronoi mesh
Added the initial file for the Voronoi grid helper code.
Updated to use voronoi_helpers
Remove unused file
Ensure huge assumes correct type in kdtree
Move points to global scope to avoid pointer getting corrupt
Fix bug for cells with neighbors that are cell 0 in Python notation. Also fix intersection with boundaries.
Ensure that random_position_cell cannot stay stuck in an infinite loop
Changes following the code review in #1.

- Fix code style,
- use Numpy arrays and related API more thoroughly and consistently,
- made the neighbours table a cached property,
- change the way bounding boxes are presented in the table.
An optimization in the computation of the simplex's volume, some minor refactoring and naming fixes.