Add logo for github readme
Merge branch 'master' of https://github.com/HaxeFlixel/haxeflixel.com

# By Chris (1) and ProG4mr (1)
# Via Chris
* 'master' of https://github.com/HaxeFlixel/haxeflixel.com:
  Fix the favicon for nested paths
  FlxCameraDemo added.