Rename violin to violinplot. Closes #34
Change violin to violinplot elsewhere in docs
Change how kde support it computed
Compute kde with statsmodels (#12) and introduce bivariate KDE (#40)
Moving kde computation to statsmodels in other dist plots
Fixing distplot label argument
Updating notebooks with new KDE behavior
Updating example plot
Fix comments in distribution notebook
Merge pull request #44 from mwaskom/omnibus_kde_changes

Omnibus KDE changes