Removed dangling references when picking
Merge branch 'master' into leak
Merge branch 'master' into leak
Merge branch 'master' into leak
Merge branch 'master' into leak
Merged master to leak
Merge branch 'master' into leak
Merge remote-tracking branch 'origin/master' into leak
Merge branch 'master' into leak
Merge branch 'master' into leak
Picking JavaScript improvements
Tweak the look of GridMaterial based on user feedback.
Rename `HelloWorld.html` to `index.html`

Also add Chrome Frame tag to Hello World so it works in IE if GCF is installed.

This change was largely a result of some end-user usability feedback in a recent Cesium hackathon.
Dynamic Paths would sometimes render incorrectly.

We were storing the referenceFrame property on each interval rather than the interval.data property.  When an interval is split (because of new incoming data) the property was lost.  We need to stre the referenceFrame on the data property instead.
Add index.html for the small release zip.
Update Cesium.js index.html with external links.
#571: start of implementation for creating tab for each label.
Work around cross-origin Web Worker problems.

You can't create a Worker with a cross-origin URL, but you can create a Worker from a Blob URL containing a string which uses importScripts() to load that very same cross-origin URL.  Now, to me, this means you ought to just be able to create a Worker directly from a cross-origin URL, but I don't write the spec.
Merge master to leak
Fix tab/space inconsistency.