Revert Steve’s changes to header logo, the change made the logo loose definition and contrast for a negligible size.
Merge branch 'dev' of https://github.com/HaxeFlixel/haxeflixel.com into dev

* 'dev' of https://github.com/HaxeFlixel/haxeflixel.com:
  Revert Steve’s changes to header logo, the change made the logo loose definition and contrast for a negligible size.