This patch modifies the image link of the "Download with cx.ring"
badge.
It also takes care of escaping chevrons to display the build
instructions properly on some markdown viewers such as the Github one.

Change-Id: If6487010f80222516b4390675b6fd40e94fa1cf4
Reviewed-by: Alexandre Lision <alexandre.lision@savoirfairelinux.com>