Add dev load and dev redner tabs for comments so that you can see their...

Add dev load and dev redner tabs for comments so that you can see their fields. alas, the comment permalink implementation is pretty bizaare from a menu perspective (it seems - din't investigate). so the new tabs can only be seen at comment/%comment/devel/load and comment/%comment/devel/render. thes pages are not linked on the comment permalink page - the node's tabs are.