Merge pull request #222 from hannu/gh-pages

Page: Add opengraph tags to landing page
Merge pull request #232 from hannu/gh-pages

Page: Add Google Analytics tracking code to landing page
Re-arrange CSS
Building result
Clearfix for sections
Show commands to see the demo
Do not make terminal too narrow
Building results
Merge pull request #235 from varya/gh-pages

Demo instructions
Move "View on GitHub" button back
Add title into terminal
Merge pull request #239 from varya/gh-pages

Move "View on GitHub" button back