One dark Shade UI theme

A dark UI theme, based on the original One dark UI theme, with some subtle, relaxing tweaks.

Tweaks

The main difference between Shade and the original One dark UI is that the filesystem tree gets a lower-contrast styling with de-emphasized icons -- allowing the eyes to focus more on the main editor without competition and distraction.

Read all about what the original One dark UI theme can do here: https://github.com/atom/one-dark-ui