smoothed arg for all DiffusionAnalyzer classmethods
add kpoints per reciprocal volume
update docs
remove stray print statement
Add initial disp and inital structure default parameters.
Merge branch 'kpoint_by_volume' of https://github.com/materialsproject/pymatgen
Some simplification of diffusion analyzer code.
Remove unused import.
Fix Py3k changes for BS plotter.
Merge branch 'master' of github.com:materialsproject/pymatgen
Merge branch 'master' into surface