Optimize combined geometry's bounding sphere.
Updates based on review.
Test responseType 'blob' after calling open.  Firefox throws when setting responseType before opening.
Merge pull request #1004 from AnalyticalGraphicsInc/fixLoadImageViaBlobInFirefox

Fix blob-based image loading in Firefox and IE11
If a task throws an error, reject the promise.

Also add tests for TaskProcessor, and add a helper function to do Jasmine-style "waitsFor" on a promise, then assert on the result or error.
Merge pull request #999 from AnalyticalGraphicsInc/geometryBoundingSphere

Optimize Geometry Bounding Sphere
Store the default TaskProcessor workerModulePrefix as well to make it easier to reset after tests.
Merge pull request #1005 from AnalyticalGraphicsInc/reportTaskProcessorFailure

Add error handling to TaskProcessor
Merge branch 'master' into geometryWebWorker

Conflicts:
	Source/Core/GeometryPipeline.js