Use relative links so they work on gh-pages

Signed-off-by: Si Beaumont <simon.beaumont@citrix.com>
Use markdown for homepage

Signed-off-by: Si Beaumont <simon.beaumont@citrix.com>
Add .gitignore (ignore _site)

Signed-off-by: Si Beaumont <simon.beaumont@citrix.com>
Remove CNAME

Signed-off-by: Si Beaumont <simon.beaumont@citrix.com>