Add Camera Tutorial example to the Sandcastle to accompany the blog post.
Fix camera event aggregation in the ScreenSpaceCameraController.
Add test for ScreenSpaceCameraController.
Update CHANGES.md.
Merge pull request #512 from AnalyticalGraphicsInc/event-aggregator

Fix event aggregation bug.
Add instructions to the camera tutorial example in the Sandcastle.
Merge branch 'master' into camera-tutorial
Update based on review.
Fix jslint warnings.
Update look speed.
Merge pull request #511 from AnalyticalGraphicsInc/camera-tutorial

Camera Tutorial
Revert a mistaken change I made.

This reverts commit 1794e9af919d963195cb9c2a4c35e0f2357297cf.
Merge remote-tracking branch 'origin/master' into playback