Remove global <a> color style, fixing label selectors
Merge branch 'master' of https://github.com/StylishThemes/GitHub-Dark

* 'master' of https://github.com/StylishThemes/GitHub-Dark:
  version bump
Global: Fix Clipboard button color
Revert removing <a> style
Prose diffs: Various improvements, #189
Notifications: Fix filter colors
Global: Try a flat header
New issue: make form background colors consistent. Fixes #190
Global: Add slight box-shadow to selected input elements
Commits: Fix bottom border on commit-groups
Gist: Fix background on gist title
Side navigation: update styling. Fixes #191
version bump
Merge branch 'master' into gh-pages