Optimize polyline collection bounding spheres.
Merge master into polylineBoundingSphere.
Clone bounding sphere after creating a command instead of union with previous.
Merge branch 'master' into polylineBoundingSphere
Add test.
Merge branch 'master' into polylineBoundingSphere
The WeakMap shim should use the built-in version if available.

Firefox and IE11 have built-in support, so we can skip all this workaround junk.  Also comment out some parts of the shim that we don't actually need (NodeJS & global versions, and a createStorage helper function).
Bail out of render loop if CesiumWidget/Viewer is destroyed.

This fixes a number of uncaught exceptions while running specs.  If the widget is destroyed, calling resize throws an exception, which is caught, but the exception handler then tries to raise onRenderLoopError, which has become undefined, which throws again.
Update CHANGES.md.
Merge pull request #997 from AnalyticalGraphicsInc/polylineBoundingSphere

Optimize Polyline Bounding Spheres
Merge pull request #1007 from AnalyticalGraphicsInc/fixRenderLoopWhenDestroying

Bail out of render loop if CesiumWidget/Viewer is destroyed.
Improve MIME type support in server.

Move MIME types to a text file to make it easier to manage.  Add proper MIME type for GeoJSON.
Update the Widget examples to use the Cesium prefix.
Merge pull request #1008 from AnalyticalGraphicsInc/improveMimeTypeInServer

Improve MIME type support in server.
Merge pull request #1009 from AnalyticalGraphicsInc/drag-drop-faq

Update the Widget examples to use the Cesium prefix
Convert JSHint settings to a .jshintrc file.

The new version of the Eclipse JSHint plugin, 0.9.8, now stores settings in this more standard format.
Merge pull request #1012 from AnalyticalGraphicsInc/updateJSHintOptions

Convert JSHint settings to a .jshintrc file.
Use less obtrusive comments to make it easier to diff in the future.
Upgrade Knockout from version 2.2.1 to 2.3.0.
Merge pull request #1006 from AnalyticalGraphicsInc/fixWeakmapShim

The WeakMap shim should use the built-in version if available.