[Reach]

Can certainly add another Tier. Wasn't sure if there would be interest or not but now we know.

Added jumping pullups since they're a good way to work up to pullups. Also added some other exercises that are basically prerequisites for the stuff to come. Hope that's more reasonable!

I tried to minimize equipment, but there are other things I can add in the future too (planks, ab wheel, front and back levers etc)