Xen Orchesta 3.5.1

A minor release for a minor fix ;)

Want to upgrade in XOA? As explained in the documentation, just type that:

npm update --global xo-web xo-server  
systemctl restart xo-server.service  

And you're done! You should see "(xo-web 3.5.1)" in the About page.

This is also the occasion to told you we officially exceed 200 unique downloads since the 3.5 release!

Thank you!