fix for sending content-type header during GET requests

src/main/coffeescript/view/OperationView.coffee

@@ -153,9 +153,13 @@ class OperationView extends Backbone.View
       if paramContentTypeField
         obj.contentType = paramContentTypeField
 
-      if not obj.data
+      log 'content type = ' + obj.contentType
+
+      if not obj.data or (obj.type is 'GET' or obj.type is 'DELETE')
         obj.contentType = false
 
+      log 'content type is now = ' + obj.contentType
+
       responseContentTypeField = $('.content > .content-type > div > select[name=contentType]', $(@el)).val()
       if responseContentTypeField
         obj.headers = if obj.headers? then obj.headers else {}