Create Pixelblaze backend

[savdb]

Implement a new backend for Pixelblaze.

Update README with information on the new backend.

Adds some helper files, like a js/epe pattern file that's required to be added to the pixelblaze before running MariMapper

Adds a helper function upload_map_to_pixelblaze.py that converts the led_map_3.csv to an array and uploads it to the pixelblaze server.

[savdb]

This should fix #19 and #22

[TheMariday]

Just updated some linting so the build would pass but bar that absolutely perfect and no notes!
Thank you so much for this feature!

I'm sure the PixelBlaze forums will be glad to see this!

[TheMariday]

WAIT NO WHAT HAVE I DONE TO MY BEAUTIFUL 100% PYTHON PROJECT XD