Add defined
Fix doc
Don't render if width or height is 0.
Remove unused CSS class.
Resize every frame, before rendering, instead of every 60.

Removes the need for window resize listeners as well.
Add copy of CZML files to Specs/Data directory

This allows the Specs to run on the website and makes sure we don't reach out above the Specs directory.
Update CHANGES.
Merge pull request #896 from AnalyticalGraphicsInc/issue834

Don't render if width or height is 0.
Merge pull request #902 from andre-nunes/issue893

Add defined()
Remove extra line breaks.
Fix formatting.
Merge pull request #903 from AnalyticalGraphicsInc/isolateSpecs

Add copy of CZML files to Specs/Data directory
Merge branch 'master' of https://github.com/AnalyticalGraphicsInc/cesium into googleEarth