#736 first spike of being able to invoke GET operations and view the response, code, headers
#736 add animated progress icon
#736 syntax highlight the response xml/json/html nicely in the editor
#736 allow the editor directive to output the editor so we can call functions like autoFormat on it
#736 allow autoformatting of the result and tidied the css a little more
#736 add tabs for the output so we can show it as source/raw or forms