Scheddebug Reader

Add a function ``LoadsPerCore()``, which will read CPU loads for each container. Currently, we only support ``Sched Debug Version: v0.11``
I can see the need for this interface, but what I don't like is that each step can be asked for the LoadsPerCore() when in reality it should only be available at the end no? What about having AddLine() return (schedDebugReaderState, bool, error) where error says if we're done reading the file.