Minor fixes to JavaScript and README

[gazayas]

Besides the changes I added here, the following two methods stood out to me:

1. keyDownFunction
2. keyUpFunction

There's some duplicate code here so I'd be glad to refactor some of it, but it looks like these methods aren't being used in the first place:

magic_test/app/views/magic_test/_listeners.html

Lines 2 to 3 in b086d2f

	// document.addEventListener('keydown', function(e){keyDownFunction(e)}, true);
	// document.addEventListener('keyup', function(e){keyUpFunction(e)}, true);

For that reason I won't worry about it too much now, but if we just want to get rid of these methods I can go head and delete them.