Unicornhat

This version switches from using DMA channel 5, which seems to be causing issues on at least the Pi 3, to DMA channel 10, which users have reported as working.

It also depends on `rpi_ws281x` version 3.0.2 which includes a fix for gamma correction.

If you're having issues with your Pi freezing and your SD card becoming write-only, run:


sudo pip install unicornhat --upgrade

This version marks a switch from the hard-forked rpi_ws281x codebase previously available in this repository, to rpi_ws281x-python available here: https://github.com/pimoroni/rpi_ws281x-python

The codebase is broadly the same, although gamma correction has now been converted to be runtime settable instead of loaded from a static table.

This release fixes a few things and adds some missing features.

* Feature: Added set_all and shade_pixels which now drives set_pixels
* Feature: Added PHAT_VERTICAL optional orientation
* Bugfix: get_brightness now returns value
* Bugfix: get_pixels now takes into account pHAT/HAT shape