Add missing image with ICC profile

It was expected to be there as of 962d56c in Feb 2013
Yet was never commit as far as I can tell.

I haven't found what that image might have been, so I grabbed
an image with ICC version 2 and ICC version 4 profiles from
http://www.color.org/version4html.xalter and confirmed
the code works as expected

Magick::Image.read("./doc/ex/images/image_with_profile.jpg").first.color_profile
returns a string of characters. (Otherwise it would return nil)

Author: bf4

.gitignore

@@ -7,7 +7,6 @@ Gemfile.lock
 InstalledFiles
 _yardoc
 coverage
-doc/
 lib/bundler/man
 pkg
 rdoc