Add CNAME to redirect to www.solarma.it

See https://help.github.com/articles/setting-up-a-custom-domain-with-github-pages

Signed-off-by: Gianpaolo Macario <gianpaolo.macario@solarma.it>
Merge pull request #2 from SOLARMA/add-cname

Add CNAME to redirect to www.solarma.it