don't make user play count a link unless enough recently played games
added more consistent styling to user show text
changed avatar image cropping
image size styling for user avatar
added avatar upload requirements note
added image preview text after file with invalid extension is selected
added image validations for user avatar
added jquery validation for avatar file size
added validation messages for user pages
avatar upload changes

* dragonfly_image_preview:
  added validation messages for user pages
  added jquery validation for avatar file size
  added image validations for user avatar
  added image preview text after file with invalid extension is selected
  added avatar upload requirements note
  image size styling for user avatar
  changed avatar image cropping