Merge pull request spotify#35 from spotify/v_2.3.5

2.3.5

Merge pull request spotify#21 from gregorybchris/master

Update orientation doc string

Merge pull request spotify#10 from spotify/chris/upgrade_pillow

Upgrade Pillow

Merge pull request spotify#8 from spotify/chris/default_legend_sort

Categorical scatter plots

Merge pull request spotify#5 from spotify/chris/fix_broken_columndata…

…store

Fix columndatasource bug

Fixed issue with xaxis subgroup orientation and updated examples

updated makefile with twine