Slight Refactor of ClassLoader

This is a rather trivial issue: I'd like to add a function to the Common\ClassLoader called getClassPath($className) or something named similarly so that we are able to find where an autoloader will look for the specified class. The autoloader doesn't check for file existence normally (as it shouldn't) but there are cases where the developer does need to make sure that the file exists before a class is attempted to be loaded.

I've attached a patch for the changes that I'm proposing.