namespace cleanup: add plot_ prefix to visualization function and deprecate old functions.
import/namespace cleanups
pep8 fixes
use plot_fock_distribution instead of fock_distribution also internally
import plot_... functions
pep8 fixes
bug fix in plot_energy_levels function dispatch
fixed integer/float bugs
added plot_wigner and fixed minor bugs
added import of plot_winger in init file
Merge pull request #102 from jrjohansson/patches-visualization

Patches visualization