Discussions: Slightly darker issue refs
Gists: Fix social counters
Gists: Fix comment header colors
Discussions: Fix a few hover colors
Repo sidebar: Fix currently selected item color
News: Fix color of certain messages
Discussions: Fix comment type icon
Issues: Fix keyboard shortcuts link
Improve diff file highlighting in the native color scheme
News: Fix branch link color
Gists: Fix markdown background
Merge branch 'master' of https://github.com/StylishThemes/GitHub-Dark

* 'master' of https://github.com/StylishThemes/GitHub-Dark:
  News: Fix branch link color
version bump