Merge remote-tracking branch 'origin/master' into trackedEntityChangedEvent

# Conflicts:
#	CHANGES.md

Author: emackey

CHANGES.md

@@ -4,6 +4,7 @@ Change Log
 ### 1.32 - 2017-04-03
 
 * Added the event `Viewer.trackedEntityChanged`, which is raised when the value of `viewer.trackedEntity` changes. [#5060](https://github.com/AnalyticalGraphicsInc/cesium/pull/5060)
+* Fix crunch compressed textures in IE11. [#5057](https://github.com/AnalyticalGraphicsInc/cesium/pull/5057)
 
 ### 1.31 - 2017-03-01
 

Source/Workers/transcodeCRNToDXT.js

@@ -133,7 +133,10 @@ define([
 
         // Mipmaps are unsupported, so copy the level 0 texture
         // When mipmaps are supported, a copy will still be necessary as dxtData is a view on the heap.
-        var level0DXTData = dxtData.slice(0, PixelFormat.compressedTextureSize(format, width, height));
+        var length = PixelFormat.compressedTextureSize(format, width, height);
+        var level0DXTData = new Uint8Array(length);
+        level0DXTData.set(dxtData, 0);
+
         transferableObjects.push(level0DXTData.buffer);
         return new CompressedTextureBuffer(format, width, height, level0DXTData);
     }