Theme: Dark Theme based on Atom One Dark Syntax

[pslobo]

Not sure if you’ve seen them yet, but there are a few more resources popping up:

• From @macdrifter: http://support.hogbaysoftware.com/t/less-for-theming
• From @complexpoint: http://support.hogbaysoftware.com/t/taskpaper-3-themes
• Initial documentation: https://jessegrosjean.gitbooks.io/taskpaper/content/themes.html