download.md: remove chrome extension
download.md: center extension divs
privly.css: change privly-browser-combo to inline-block
download.md: align left extension paragraph
Merge pull request #10 from spectralsun/remove-opera

Remove opera
Update the link to Twitter Bootstrap in the footer
Update twitter links to HTTPS and remove '#!'
Remove 'Twitter' from Bootstrap name.
Merge pull request #11 from bramwelt/bramwelt/twitter-updates

Twitter Link Updates