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.
Add index.html for the small release zip.
Update Cesium.js index.html with external links.
Fix tab/space inconsistency.
Have the Cesium.js index.html detect if it is being ran from inside a web-browser and put up a message and link if it is not.
Fixed typo
Fix CZML cartographic handling

Remove CzmlCartographic and replace it with CzmlPosition, this causes Cartographic data to be converted to Cartesian on load, rather than every time it's needed.  This also fixed #636, which was the result of incorrect interpolation.  It also simplifies some code in DynamicPositionProperty.
Update CHANGES.md
Add tooltips to Sandcastle labeled tabs and search results.
Fix polyline issue for straight lines.
Fix reference to Cesium-hint.js
Exclude new ThirdParty folder from jsHint