Fix remaining web site issues

[jlouvel]

I have created a specific milestone:
https://github.com/restlet/restlet-sites/issues?milestone=3&state=open

[thboileau]

two medium priority tickets remaining:

• https://github.com/restlet/restlet-sites/issues/41
• https://github.com/restlet/restlet-sites/issues/7

@jlouvel : can you update priorities on remaining tickets