* 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
- BlueMarbleTimeSeries example now has notice of the requirement of
local data.
- DigitalGlobe example now has notice about its example key expiration.
- ShapeFilesComplex and SurfaceShapesComplex examples were given their
corresponding .html files and were moved to the '/performance' folder.
