Remove download links from channels viewer

The download links don't point at valid downloads any more;
and the version available for download doesn't correspond to the
channel/branch anyway (e.g. the branch shown for Tizen beta is 5
but we don't have any Tizen beta 5 downloads).
Remove inline styles from channels viewer HTML
Merge pull request #87 from townxelliot/channels-viewer-edits

Channels viewer edits