Combine CSS files at build time and remove trailing whitespace.
Add README.md and .gitignore.

Also move TODO in README.md.
Fix validation errors and trim trailing spaces.
Move inline style to custom.css.
Switch to Bootstrap.

* use Pygments for code highlighting so no need for prettify.js
* Bootstrap built with only the needed components; see bootstrap-info.md
Switch to the async analytics code.
Add html5shiv and respond for old IE.
Merge pull request #1 from XhmikosR/gh-pages

Article overhaul