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This adds a very simple frontend UI and class functionality to the app.
It's not pretty at all yet (I'm still working on that, I wasn't liking any styles I tried yet) but it's a solid start to work off of.
I will state (for the record) my preference on this:
Since (in theory) you logically will Get a value after you Set it, it flows a bit better in my head that you get the this.variable value, as you could have Set it to something after the initial construction. 

I'd play with this and make sure that your Getters get the right values after you Set them.