Fixed: CSS bugs, file layout

-Most CSS stuff is stable now.
-index.html moved from demos to main folder
New: removing .mei files from project
New: multiple file upload
New: main menu with undo, redo, and "help" options

As per Tim's request for the first two, my assumption for the latter.
Fixed: bunch of small things

-Removed a stray console.log
-Switched icon presentation to background images
-Made a few things work in firefox that hadn't before.
New: documentation and accompanying template changes