* Changed background color to black in most examples
* Add atmosphere layer to all examples
* Move atmosphere layer to show inner shading on all layers.
* Added comment pointing out importance of adding the atmosphere layer at the end
- Corrected HTML script and stylesheet tags that used http
- Added https to protocol relative URLs in script tags
- Modified ServersPanel so it always constructs the server addresses
with https.
- Corrected duplicate 'https:https:' tags in two performance examples
