Json support for IE

As posted by Daniel Fisher at http://www.lennybacon.com/JSONSupportForIE.aspx

Pretty helpful while working on WCF services with JSON serialization and AJAX:

REGEDIT4

[HKEY_CURRENT_USER\Software\Classes\Mime\Database\Content Type\application/json]
"CLSID"="{25336920-03F9-11cf-8FD0-00AA00686F13}"
"Extension"=".json"