Reformat fringeView as a "proper" static class

fringeView = (function(){

function a(){}

var fringeView={}
fringeView.a=a;

return fringeView;
})();
Added simple update fringe button
updateFringe Button is now a regular html button

instead of a custom d3 object (faster from prototyping)
proper use of .style() to change css properties of the button
session manager loads previous session on startup