Select current programming language according the config/language.txt
Add sample python and clojure modules in Language
Select a logo according to the current language and delete favicon.ico

Some browsers don't even bother to look for a favicon, but try to fetch
/favicon.ico instead. If such thing happens we don't have a generic
favicon for all the languages. No favicon is better than wrong favicon.
Rename Language.run to Language.run_tests
Refactor the language initialization
lib/language.rb does not need utf-8 encoding
Re-indent a case in config/initializers/language.rb
Reorganize language specific images