Extra Strong iPad Stand

## Improvements

* This stand is big enough to stably hold a full sized ipad while still fitting on a stock printrbot.
* Iterative reinforcement (after repeated, absent-minded, destructive fiddling :p) has made this stand pretty indestructible with minimal waste.
* The outer-edges have been angled to allow home-button/soft-button access for tablets with thin bezels.
* This should work for most tablets - I've tested it with every iPad form-factor and a few android models. If you've got a