Improve hashing implementation, add convenience methods and add tutorial on Tracker usage

[eywalker]

• Improved hash implementation on Operation so now that identical hash is returned if two operations are identical in effect (i.e., two separate instances of an identical operation configured identically will return the same hash)
• Added a notebook to demonstrate the use of Tracker including the DEFAULT_TRACKER.
• Added new features to simplify common operations such as MapPackets and MapTags as well as FunctionPod creation. Added a notebook to describe these features.
• Separate data storage from PodFunction implementation. Data storage is now implemented using dependency injection pattern, allowing for easy expansion to future storage solutions.

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[guzman-raphael]

Thanks @eywalker! 💪

This makes sense but I'll admit it is much more "functional" than I was expecting for how I was planning on using the orcabridge playground. That's a good thing because I have plenty to go off of to understand your thinking/logic but I''d want to review it a bit more carefully.

To not hold up everything, I'll go ahead with it. I imagine as I start contributing it will probably start off fairly independent with the idea of eventually meeting/integrating with the rest once I've gotten a better sense of all the features you've already added.