[OOP] Clarify examples of Singleton method slide
[OOP] Improve look of first slide
Revert Rack source images
Postprocess HTML/CSS

- copy images to /public directory and fix links
- remote CSS comments
- selectively process presentations
Map /public path on the Rack server
Re-generate static presentations
Readme
Improve README, closes rubygarage.github.com#3
Merge pull request #38 from denyago/master

Improve generation of static pages