Log Message:
Update graphics/ruby-chunky_png to 1.3.4.

=== 1.3.4 - 2015-02-16

- Assert compatibility with Ruby 2.2
- Improved documentation using RDoc, so it is included on \ 
http://www.rubydoc.info/gems/chunky_png
- Update chunkypng.com website; migrate some stuff from the wiki.