disabling canvas background and enabling background image
Adding visual loader

* Adding widgets directory in js
* Adding MIDI.loader to store new widgets.loader
* Replacing jquery onload with Event.add that was in the canvas.js file
* Adjusting positioning of logo and login window to accomodate loader
* Removing loading message (yay!)
Merge branch 'master' into loading-bar

Conflicts:
	css/sequencer.css
	index.html
	js/canvas.js
Final merge fixes - removing margining on login logo and reenabling canvas
Merge pull request #55 from artfoundry/loading-bar

Loading bar