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 #10 from spotify/chris/upgrade_pillow

Upgrade Pillow

Merge pull request #8 from spotify/chris/default_legend_sort

Categorical scatter plots

Merge pull request #5 from spotify/chris/fix_broken_columndatastore

Fix columndatasource bug

Fixed issue with xaxis subgroup orientation and updated examples

updated makefile with twine