Renamed server to url
Fixed tests
Fixed WMS example
Merged master to bing
Merge branch 'master' into bing
Merged master to bing
Subset of changes needed for models
Missing doc and tests
Changed based on review
Minor cleanup to EllipsoidPrimitiveSpec.js
Merge pull request #465 from AnalyticalGraphicsInc/modelsubset

Low-level changes for models
Merge branch 'master' into bing
Changed server to url
Doc tweak
Merge pull request #417 from AnalyticalGraphicsInc/bing

Renamed BingMapsImageryProvider server to url
Updates for b12a release.
Merge tag 'tags/b12a' into cesium.agi.com

b12a release