Added Song Queue

Added a song queue that shows a playlist of songs that are loaded. It
will load the next song when one ends, you can play any song by clicking
on it in the queue, and the current song playing is highlighted green.
The variable that holds the song is called songQueue and the variable
currentSong is the number of what song is currently playing in the
queue.

The queue is located in the advance control panel, it will scroll the
number of songs displayed get past a certain height.
Next/Previous Button

Added buttons to allow for the user to go to the next song and the
previous song.
Update README.md
Added Audio plans to Drawings Folder

This is how the overall hierarchy should look like by the end of this
sprint (2).  Sources are made from buffers.  Sources connect to a gain
node, used to crossfade between songs.  Crossfade nodes will merge to an
array of BiQuadFilter nodes.  Each biquad node will have a different
effect on the song.  The first filter in the array should be connected
with the cross fade gains, while the last filter node in the array
should connect to both the analyzer node and the volume node.  The
analyzer connects to a javascript node, used to interact with Three.JS,
which is then connected to the final destination.  The volume node
connects directly to the destination, and avoids the analyzer.
Implemented the "songs" object, start using it.

the songs object has a "now", "next" and "last".  Each of those has a
source, buffer, gain object, and index.  The idea is that this is a hash
for the previous songs, the current song, and the next song.  This
allows us to mix and crossfade songs for smooth transitions.

Additionally, the method "requestSong" has been changed.  It will now
take parameters of (url, songObject), and will load a url into the
selected songObject.  The songObject is either songs.now, songs.next, or
songs.last.  This doesn't change anything yet, but will be vital to the
next change.
Allow for multiple song upload at once

Allowed the local song upload to accept multiple files on a single
upload.
calvinScene.js
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