Add Google Analytics code
Use the cesium.agi.com proxy ASHX file
Merge branch 'master' into cesium.agi.com
Merge branch 'master' into cesium.agi.com
Merge branch 'master' into cesium.agi.com
Merge branch 'master' into cesium.agi.com
Merge branch 'master' into cesium.agi.com

Conflicts:
	Examples/Sandbox/CodeSnippets/Imagery.js
Merge branch 'master' into cesium.agi.com
Merge branch 'master' into cesium.agi.com
Fix proxy URL for cesium.agi.com.
Merge branch 'master' into cesium.agi.com

Conflicts:
	Examples/Sandbox/CodeSnippets/Imagery.js
	Tools/jsdoc3/templates/default/tmpl/layout.tmpl
Update proxy url for cesium.agi.com
Merge branch 'master' into cesium.agi.com
Merge branch 'master' into cesium.agi.com
Insert Google Analytics code.
Merge branch 'master' into cesium.agi.com
Update url to .NET proxy.
Re-add AGI logo.
Merge branch 'master' into cesium.agi.com
Merge remote-tracking branch 'origin/master' into cesium.agi.com