improve the HTML

twaddle-callback-handler: nicerer HTML
move update and add reply

twaddle/twitter-update: move this function
add "q" to timelines to bury the buffer
reply works

twaddle/insert-entry: add the username in the :form property
twaddle-timeline-reply: make sure the username is picked up and added to text
twaddle/timeline-mode-map: add the reply command