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 to use 'charAt(0)' instead of
'[0]'.
Merge branch 'Version-2.1.0' of https://github.com/rwhepburn/Durandal into Version-2.0.1
Updating changes.txt.