[Ironruby-core] IronRuby example codes for image processing

[Sanghyeon Seo]

I found these interesting example codes in IronRuby for image processing.

http://d.hatena.ne.jp/arikui/20070918/1190050541
http://d.hatena.ne.jp/arikui/20071107/1194367856

Unfortunately, codes won't run out of the box because of name mangling
differences. Above codes use mixedCase instead of
lower_case_with_underscore.

-- 
Seo Sanghyeon