Global: Remove font size hacks
Merge branch 'master' of https://github.com/StylishThemes/GitHub-Dark

* 'master' of https://github.com/StylishThemes/GitHub-Dark:
  Branches: Fix 'More branches' buttons
Markdown: Fix plaintext readmes
Global: Remove three url() images
Diffs: Fix empty cells for split diffs
Diffs: Made split diff cells a bit brighter #170
version bump
User page: Style new ProTip
Change blog-feedback bg color
consolidate
Merge pull request #171 from dsoegijono/blog-feedback

Change blog-feedback bg color
User page: Change ProTip to flat blue background
User page: Update contribution calender selectors