[transaction] move RQLRewriter in Transaction
This remove the last ``AttributeError`` magic. The ``RQLRewriter`` needs a Session. Its
reset is handled in ``Session`` code to handle that
$(document).ready(function() {
$('a.rhythm').click(function (event){
$('div#pageContent').toggleClass('rhythm_bg');
$('div#page').toggleClass('rhythm_bg');
event.preventDefault();
});
});