Fixed Route Not Found error in IE11 Preview

IE11 Preview doesn't seem to implement Array-like character access as
spec'd out in ES5. This causes the Router to fail and log a _'Route Not
Found'_ error message. Strangely IE10 works ok, so I suspect this is a
regression in IE11 Preview. Changing the router to use ```charAt(0)``` instead of
``` [0] ``` fixes this issue.