Fix reference to Serbian translation
Fix typos in the Serbian translation
Add Polish translation
Update Russian translation
Add Czech translation
Fix typo in French translation

Fix gh-53
Add Danish translation
Add licensing information
Move list of translations to bottom
Add Spanish translation
Remove 'Naming', 'Organization', and 'Build'

This document should be limited to issues of style. Naming,
organization, and build processes are not strictly style but
architecture decisions.

Naming of HTML classes should live in a style guide for HTML.

Organization decisions should be part of an HTML/CSS architecture
document.

Build and deployment do not belong in a style guide.
Adjustments to language
Improve code examples
Fix incorrect indenation in example
Minor language corrections
Fix missing semi-colon in example code
Update and complete Italian translation

Reflect the latest version of idiomatic-css in the Italian translation.